For the first time ever, a star spinning so fast its mid-section is stretched out has been directly measured by an ultra-high-resolution NASA telescope system on Palomar Mountain near San Diego.
"Measuring the shape of this star, Altair, was as difficult as standing in Los Angeles, looking at a hen's egg in New York, and trying to prove that it's oval-shaped and not circular," said Dr. Charles Beichman, chief scientist for astronomy and physics at NASA's Jet Propulsion Laboratory, Pasadena, Calif.
Altair is a well-known member of the Summer Triangle, clearly visible in the summer night sky across the United States. Scientists using the Palomar Testbed Interferometer, which links multiple telescopes, measured the star's radius at different angles on the sky. They noticed the size of the star varied with changing angles, which was the first tip-off that Altair is not perfectly round.
"This surprising observation led to a bit of challenging detective work to properly interpret the data," said principal investigator Dr. Gerard van Belle of JPL. "We measured the size of another star, Vega, at the same time, which didn't change with angle, so we knew this wasn't just a fluke of the telescope."
Previous studies of Altair raised the prospect that the star might have midriff bulge, but never before had the shape been measured directly. Earlier measurements of the star's spectrum, or light-wave pattern, had hinted that Altair was rotating very fast. When a gaseous orb, like a star, spins fast enough, it tends to expand at the middle, like a beach ball that is squeezed at the top and bottom.
Altair is a perfect example—it rotates at least once every 10.4 hours, and the new Palomar observations reveal the diameter at its equator is at least 14 percent greater than at its poles. For a star that spins slowly, this effect is miniscule. For example, our Sun rotates once every 30 days and has an equator only .001 percent greater in diameter than its poles.
By measuring Altair's size at separate positions along its edge, van Belle and his colleagues determined that Altair rotates at a speed of at least 210 kilometers per second (470,000 miles per hour) at the equator. Future studies may pin down the speed more precisely.
"Determining the shape of another star helps us learn about the forces that control the shape and structure of all stars, including our star, the Sun," Beichman said. "This tells us more about the Sun's behavior and ultimate fate."
The Palomar Testbed Interferometer has three 50-centimeter (20-inch) telescopes. To study Altair, the telescopes were used two at a time. The combined light from the telescope pairs provided sharpness comparable to a telescope as large as a football field.
"Altair is the twelfth brightest star in the sky—you'd think that everything there is to know about this star would have been discovered already," said co-investigator Dr. David Ciardi of the University of Florida, Gainesville. "It's a good example of the surprises you're going to encounter when you are able to look at even familiar stars with unprecedented resolution."
The Palomar Testbed Interferometer is paving the way for the Keck Interferometer, Space Interferometry Mission and Terrestrial Planet Finder, all part of NASA's Origins program. The program will hunt for Earthlike planets that might harbor life around other stars. "In the long run, we'll use these interferometric capabilities to search for planets around nearby stars. This is an important first step," said Beichman.
Van Belle and Ciardi co-authored the Altair paper, scheduled to appear in the October 1 issue of the Astrophysical Journal, with Robert Thompson of JPL and the University of Wyoming, Laramie; Dr. Rachel Akeson of the JPL/Caltech Infrared Processing and Analysis Center, Pasadena, Calif.; and Dr. Elizabeth Lada of the University of Florida, Gainesville.
Their research was funded by NASA's Office of Space Science, Washington, D.C., along with the National Science Foundation. Palomar Observatory is owned and operated by the California Institute of Technology in Pasadena, which also manages JPL for NASA. The Palomar Testbed Interferometer was designed and built by a team of JPL researchers led by Drs. Mark Colavita and Michael Shao. Funded by NASA and managed by JPL, the interferometer is located at the Palomar Observatory near the historic 200-inch Hale Telescope.
Copyright(c) 2009- NASA/JPL California Institute of Technology. Multimission Image Processing Lab All rights reserved. U.S. Government sponsorship is acknowledged.
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Privacy Policy
Revised: November 23rd, 2021
Thank you for choosing to be part of my website at https://www.stargazers.us (“Company”, “I”, “me”, “mine”). We are committed to protecting your personal information and your right to privacy. If you have any questions or concerns about this privacy notice, or our practices with regards to your personal information, please contact Kevin at me@kpirnie.com.
When you visit our website https://www.stargazers.us (the “Website”), and more generally, use any of our services (the “Services”, which include the Website), we appreciate that you are trusting us with your personal information. We take your privacy very seriously. In this privacy notice, we seek to explain to you in the clearest way possible what information we collect, how we use it and what rights you have in relation to it. We hope you take some time to read through it carefully, as it is important. If there are any terms in this privacy notice that you do not agree with, please discontinue use of our Services immediately.
This privacy notice applies to all information collected through our Services (which, as described above, includes our Website), as well as, any related services, sales, marketing or events.
Please read this privacy notice carefully as it will help you understand what we do with the information that we collect.
1. WHAT INFORMATION DO WE COLLECT?
Information automatically collected
In Short: Some information – such as your Internet Protocol (IP) address, location, and/or browser and device characteristics – is collected automatically when you visit our Website.
We automatically collect certain information when you visit, use or navigate the Website. This information does not reveal your specific identity (like your name or contact information) but may include device and usage information, such as your IP address, browser and device characteristics, operating system, language preferences, referring URLs, device name, country, location, information about how and when you use our Website and other technical information. This information is primarily needed to location specific data to you, maintain the security and operation of our Website, and for our internal analytics and reporting purposes.
Like many businesses, we also collect information through cookies and similar technologies.
The information We collect includes:
Log and Usage Data. Log and usage data is service-related, diagnostic, usage and performance information our servers automatically collect when you access or use our Website and which we record in log files. Depending on how you interact with us, this log data may include your IP address, device information, browser type and settings and information about your activity in the Website (such as the date/time stamps associated with your usage, pages and files viewed, searches and other actions you take such as which features you use), device event information (such as system activity, error reports (sometimes called ‘crash dumps’) and hardware settings).
Device Data. We collect device data such as information about your computer, phone, tablet or other device you use to access the Website. Depending on the device used, this device data may include information such as your IP address (or proxy server), device and application identification numbers, location, browser type, hardware model Internet service provider and/or mobile carrier, operating system and system configuration information.
Location Data. We collect location data such as information about your device’s location, which can be either precise or imprecise. How much information we collect depends on the type and settings of the device you use to access the Website and will require your acceptance. For example, we may use GPS and other technologies to collect geolocation data that tells me your current location (based on your IP address). You can opt out of allowing me to collect this information either by refusing access to the information or by disabling your Location setting on your device. Note however, if you choose to opt out, you may not be able to use certain aspects of the Services.
2. HOW DO WE USE YOUR INFORMATION?
In Short: We process your information for purposes of local data display to you, based on legitimate business interests, the fulfillment of my contract with you, compliance with my legal obligations, and/or your consent.
We use personal information collected via my Website for a variety of business purposes described below. We process your personal information for these purposes in reliance on providing you with local relevant data, my legitimate business interests, in order to enter into or perform a contract with you, with your consent, and/or for compliance with my legal obligations. We indicate the specific processing grounds we rely on next to each purpose listed below.
Local relevant data. We use your location in order to provide you with accurate weather forecasts, seeing conditions, moon and sun information, and other general astronomy based information.
For other business purposes. We may use your information for other business purposes, such as data analysis, identifying usage trends, determining the effectiveness of our promotional campaigns and to evaluate and improve my Website, products, marketing and your experience. We may use and store this information in aggregated and anonymized form so that it is not associated with individual end users and does not include personal information. We will not use identifiable personal information without your consent.
3. WILL YOUR INFORMATION BE SHARED WITH ANYONE?
In Short: We only share information with your consent, to comply with laws, to provide you with services, to protect your rights, or to fulfill business obligations.
4. DO WE USE COOKIES AND OTHER TRACKING TECHNOLOGIES?
In Short: We may use cookies and other tracking technologies to collect and store your information.
We may use cookies and similar tracking technologies (like web beacons and pixels) to access or store information. We do not have a cookie notice available at this time, and allowing us to store cookies is requried to utilize the data represented in this Website.
5. IS YOUR INFORMATION TRANSFERRED INTERNATIONALLY?
In Short: We may transfer, store, and process your information in countries other than your own.
Our servers are located in the United States of America, unless otherwise requested by our clients. If you are accessing our Website from outside, please be aware that your information may be transferred to, stored, and processed by us in my facilities and by those third parties with whom we may share your personal information (see “WILL YOUR INFORMATION BE SHARED WITH ANYONE?” above), in and other countries.
If you are a resident in the European Economic Area, then these countries may not necessarily have data protection laws or other similar laws as comprehensive as those in your country. We will however take all necessary measures to protect your personal information in accordance with this privacy notice and applicable law.
6. HOW LONG DO WE KEEP YOUR INFORMATION?
In Short: We keep your information for as long as necessary to fulfill the purposes outlined in this privacy notice unless otherwise required by law.
We will only keep your personal information for as long as it is necessary for the purposes set out in this privacy notice, unless a longer retention period is required or permitted by law (such as tax, accounting or other legal requirements). No purpose in this notice will require me keeping your personal information for longer than 6 months.
When we have no ongoing legitimate business need to process your personal information, we will either delete or anonymize such information, or, if this is not possible (for example, because your personal information has been stored in backup archives), then we will securely store your personal information and isolate it from any further processing until deletion is possible.
7. HOW DO WE KEEP YOUR INFORMATION SAFE?
In Short: We aim to protect your personal information through a system of organizational and technical security measures.
We have implemented appropriate technical and organizational security measures designed to protect the security of any personal information we process. However, despite our safeguards and efforts to secure your information, no electronic transmission over the Internet or information storage technology can be guaranteed to be 100% secure, so we cannot promise or guarantee that hackers, cybercriminals, or other unauthorized third parties will not be able to defeat our security, and improperly collect, access, steal, or modify your information. Although we will do our best to protect your personal information, transmission of personal information to and from our Website is at your own risk. You should only access the Website within a secure environment.
8. DO WE COLLECT INFORMATION FROM MINORS?
In Short: We do not knowingly collect data from or market to children under 18 years of age.
We do not knowingly solicit data from or market to children under 18 years of age. By using the Website, you represent that you are at least 18 or that you are the parent or guardian of such a minor and consent to such minor dependent’s use of the Website. If we learn that personal information from users less than 18 years of age has been collected, we will deactivate the account and take reasonable measures to promptly delete such data from my records. If you become aware of any data we may have collected from children under age 18, please contact me at .
9. WHAT ARE YOUR PRIVACY RIGHTS?
In Short: You may review, change, or terminate your account at any time.
If you are a resident in the European Economic Area and you believe we am unlawfully processing your personal information, you also have the right to complain to your local data protection supervisory authority. You can find their contact details here: http://ec.europa.eu/justice/data-protection/bodies/authorities/index_en.htm.
Cookies and similar technologies: Most Web browsers are set to accept cookies by default. If you prefer, you can usually choose to set your browser to remove cookies and to reject cookies. If you choose to remove cookies or reject cookies, this could affect certain features or services of my Website.
10. CONTROLS FOR DO-NOT-TRACK FEATURES
Most web browsers and some mobile operating systems and mobile applications include a Do-Not-Track (“DNT”) feature or setting you can activate to signal your privacy preference not to have data about your online browsing activities monitored and collected. At this stage no uniform technology standard for recognizing and implementing DNT signals has been finalized. As such, we do not currently respond to DNT browser signals or any other mechanism that automatically communicates your choice not to be tracked online. If a standard for online tracking is adopted that we must follow in the future, we will inform you about that practice in a revised version of this privacy notice.
11. DO CALIFORNIA RESIDENTS HAVE SPECIFIC PRIVACY RIGHTS?
In Short: Yes, if you are a resident of California, you are granted specific rights regarding access to your personal information.
California Civil Code Section 1798.83, also known as the “Shine The Light” law, permits our users who are California residents to request and obtain from me, once a year and free of charge, information about categories of personal information (if any) we disclosed to third parties for direct marketing purposes and the names and addresses of all third parties with which we shared personal information in the immediately preceding calendar year. If you are a California resident and would like to make such a request, please submit your request in writing to me using the contact information provided below.
If you are under 18 years of age, reside in California, and have a registered account with the Website, you have the right to request removal of unwanted data that you publicly post on the Website. To request removal of such data, please contact us using the contact information provided below, and include the email address associated with your account and a statement that you reside in California. We will make sure the data is not publicly displayed on the Website, but please be aware that the data may not be completely or comprehensively removed from all our systems (e.g. backups, etc.).
12. DO WE MAKE UPDATES TO THIS NOTICE?
In Short: Yes, we will update this notice as necessary to stay compliant with relevant laws.
We may update this privacy notice from time to time. The updated version will be indicated by an updated “Revised” date and the updated version will be effective as soon as it is accessible. If we make material changes to this privacy notice, we may notify you either by prominently posting a notice of such changes or by directly sending you a notification. We encourage you to review this privacy notice frequently to be informed of how we are protecting your information.
13. HOW CAN YOU CONTACT US ABOUT THIS NOTICE?
If you have questions or comments about this notice, you may email Kevin at me@kpirnie.com or by post to:
Kevin C. Pirnie
22 Orlando St.
Feeding Hills, MA 01030
United States of America
14. HOW CAN YOU REVIEW, UPDATE, OR DELETE THE DATA WE COLLECT FROM YOU?
Based on the applicable laws of your country, you may have the right to request access to the personal information we collect from you, change that information, or delete it in some circumstances. To request to review, update, or delete your personal information, you may email Kevin at me@kpirnie.com or by post to:
Kevin C. Pirnie
22 Orlando St.
Feeding Hills, MA 01030
United States of America
Our Privacy Policy
Revised: November 23rd, 2021
Thank you for choosing to be part of my website at https://www.stargazers.us ("Company", "I", "me", "mine"). We are committed to protecting your personal information and your right to privacy. If you have any questions or concerns about this privacy notice, or our practices with regards to your personal information, please contact Kevin at me@kpirnie.com.
When you visit our website https://www.stargazers.us (the "Website"), and more generally, use any of our services (the "Services", which include the Website), we appreciate that you are trusting us with your personal information. We take your privacy very seriously. In this privacy notice, we seek to explain to you in the clearest way possible what information we collect, how we use it and what rights you have in relation to it. We hope you take some time to read through it carefully, as it is important. If there are any terms in this privacy notice that you do not agree with, please discontinue use of our Services immediately.
This privacy notice applies to all information collected through our Services (which, as described above, includes our Website), as well as, any related services, sales, marketing or events.
Please read this privacy notice carefully as it will help you understand what we do with the information that we collect.
1. WHAT INFORMATION DO WE COLLECT?
Information automatically collected
In Short: Some information - such as your Internet Protocol (IP) address, location, and/or browser and device characteristics - is collected automatically when you visit our Website.
We automatically collect certain information when you visit, use or navigate the Website. This information does not reveal your specific identity (like your name or contact information) but may include device and usage information, such as your IP address, browser and device characteristics, operating system, language preferences, referring URLs, device name, country, location, information about how and when you use our Website and other technical information. This information is primarily needed to location specific data to you, maintain the security and operation of our Website, and for our internal analytics and reporting purposes.
Like many businesses, we also collect information through cookies and similar technologies.
The information We collect includes:
Log and Usage Data. Log and usage data is service-related, diagnostic, usage and performance information our servers automatically collect when you access or use our Website and which we record in log files. Depending on how you interact with us, this log data may include your IP address, device information, browser type and settings and information about your activity in the Website (such as the date/time stamps associated with your usage, pages and files viewed, searches and other actions you take such as which features you use), device event information (such as system activity, error reports (sometimes called 'crash dumps') and hardware settings).
Device Data. We collect device data such as information about your computer, phone, tablet or other device you use to access the Website. Depending on the device used, this device data may include information such as your IP address (or proxy server), device and application identification numbers, location, browser type, hardware model Internet service provider and/or mobile carrier, operating system and system configuration information.
Location Data. We collect location data such as information about your device's location, which can be either precise or imprecise. How much information we collect depends on the type and settings of the device you use to access the Website and will require your acceptance. For example, we may use GPS and other technologies to collect geolocation data that tells me your current location (based on your IP address). You can opt out of allowing me to collect this information either by refusing access to the information or by disabling your Location setting on your device. Note however, if you choose to opt out, you may not be able to use certain aspects of the Services.
2. HOW DO WE USE YOUR INFORMATION?
In Short: We process your information for purposes of local data display to you, based on legitimate business interests, the fulfillment of my contract with you, compliance with my legal obligations, and/or your consent.
We use personal information collected via my Website for a variety of business purposes described below. We process your personal information for these purposes in reliance on providing you with local relevant data, my legitimate business interests, in order to enter into or perform a contract with you, with your consent, and/or for compliance with my legal obligations. We indicate the specific processing grounds we rely on next to each purpose listed below.
Local relevant data. We use your location in order to provide you with accurate weather forecasts, seeing conditions, moon and sun information, and other general astronomy based information.
For other business purposes. We may use your information for other business purposes, such as data analysis, identifying usage trends, determining the effectiveness of our promotional campaigns and to evaluate and improve my Website, products, marketing and your experience. We may use and store this information in aggregated and anonymized form so that it is not associated with individual end users and does not include personal information. We will not use identifiable personal information without your consent.
3. WILL YOUR INFORMATION BE SHARED WITH ANYONE?
In Short: We only share information with your consent, to comply with laws, to provide you with services, to protect your rights, or to fulfill business obligations.
4. DO WE USE COOKIES AND OTHER TRACKING TECHNOLOGIES?
In Short: We may use cookies and other tracking technologies to collect and store your information.
We may use cookies and similar tracking technologies (like web beacons and pixels) to access or store information. We do not have a cookie notice available at this time, and allowing us to store cookies is requried to utilize the data represented in this Website.
5. IS YOUR INFORMATION TRANSFERRED INTERNATIONALLY?
In Short: We may transfer, store, and process your information in countries other than your own.
Our servers are located in the United States of America, unless otherwise requested by our clients. If you are accessing our Website from outside, please be aware that your information may be transferred to, stored, and processed by us in my facilities and by those third parties with whom we may share your personal information (see "WILL YOUR INFORMATION BE SHARED WITH ANYONE?" above), in and other countries.
If you are a resident in the European Economic Area, then these countries may not necessarily have data protection laws or other similar laws as comprehensive as those in your country. We will however take all necessary measures to protect your personal information in accordance with this privacy notice and applicable law.
6. HOW LONG DO WE KEEP YOUR INFORMATION?
In Short: We keep your information for as long as necessary to fulfill the purposes outlined in this privacy notice unless otherwise required by law.
We will only keep your personal information for as long as it is necessary for the purposes set out in this privacy notice, unless a longer retention period is required or permitted by law (such as tax, accounting or other legal requirements). No purpose in this notice will require me keeping your personal information for longer than 6 months.
When we have no ongoing legitimate business need to process your personal information, we will either delete or anonymize such information, or, if this is not possible (for example, because your personal information has been stored in backup archives), then we will securely store your personal information and isolate it from any further processing until deletion is possible.
7. HOW DO WE KEEP YOUR INFORMATION SAFE?
In Short: We aim to protect your personal information through a system of organizational and technical security measures.
We have implemented appropriate technical and organizational security measures designed to protect the security of any personal information we process. However, despite our safeguards and efforts to secure your information, no electronic transmission over the Internet or information storage technology can be guaranteed to be 100% secure, so we cannot promise or guarantee that hackers, cybercriminals, or other unauthorized third parties will not be able to defeat our security, and improperly collect, access, steal, or modify your information. Although we will do our best to protect your personal information, transmission of personal information to and from our Website is at your own risk. You should only access the Website within a secure environment.
8. DO WE COLLECT INFORMATION FROM MINORS?
In Short: We do not knowingly collect data from or market to children under 18 years of age.
We do not knowingly solicit data from or market to children under 18 years of age. By using the Website, you represent that you are at least 18 or that you are the parent or guardian of such a minor and consent to such minor dependent's use of the Website. If we learn that personal information from users less than 18 years of age has been collected, we will deactivate the account and take reasonable measures to promptly delete such data from my records. If you become aware of any data we may have collected from children under age 18, please contact me at [main_email link="1"].
9. WHAT ARE YOUR PRIVACY RIGHTS?
In Short: You may review, change, or terminate your account at any time.
If you are a resident in the European Economic Area and you believe we am unlawfully processing your personal information, you also have the right to complain to your local data protection supervisory authority. You can find their contact details here: http://ec.europa.eu/justice/data-protection/bodies/authorities/index_en.htm.
Cookies and similar technologies: Most Web browsers are set to accept cookies by default. If you prefer, you can usually choose to set your browser to remove cookies and to reject cookies. If you choose to remove cookies or reject cookies, this could affect certain features or services of my Website.
10. CONTROLS FOR DO-NOT-TRACK FEATURES
Most web browsers and some mobile operating systems and mobile applications include a Do-Not-Track ("DNT") feature or setting you can activate to signal your privacy preference not to have data about your online browsing activities monitored and collected. At this stage no uniform technology standard for recognizing and implementing DNT signals has been finalized. As such, we do not currently respond to DNT browser signals or any other mechanism that automatically communicates your choice not to be tracked online. If a standard for online tracking is adopted that we must follow in the future, we will inform you about that practice in a revised version of this privacy notice.
11. DO CALIFORNIA RESIDENTS HAVE SPECIFIC PRIVACY RIGHTS?
In Short: Yes, if you are a resident of California, you are granted specific rights regarding access to your personal information.
California Civil Code Section 1798.83, also known as the "Shine The Light" law, permits our users who are California residents to request and obtain from me, once a year and free of charge, information about categories of personal information (if any) we disclosed to third parties for direct marketing purposes and the names and addresses of all third parties with which we shared personal information in the immediately preceding calendar year. If you are a California resident and would like to make such a request, please submit your request in writing to me using the contact information provided below.
If you are under 18 years of age, reside in California, and have a registered account with the Website, you have the right to request removal of unwanted data that you publicly post on the Website. To request removal of such data, please contact us using the contact information provided below, and include the email address associated with your account and a statement that you reside in California. We will make sure the data is not publicly displayed on the Website, but please be aware that the data may not be completely or comprehensively removed from all our systems (e.g. backups, etc.).
12. DO WE MAKE UPDATES TO THIS NOTICE?
In Short: Yes, we will update this notice as necessary to stay compliant with relevant laws.
We may update this privacy notice from time to time. The updated version will be indicated by an updated "Revised" date and the updated version will be effective as soon as it is accessible. If we make material changes to this privacy notice, we may notify you either by prominently posting a notice of such changes or by directly sending you a notification. We encourage you to review this privacy notice frequently to be informed of how we are protecting your information.
13. HOW CAN YOU CONTACT US ABOUT THIS NOTICE?
If you have questions or comments about this notice, you may email Kevin at me@kpirnie.com or by post to:
Kevin C. Pirnie
22 Orlando St.
Feeding Hills, MA 01030
United States of America
14. HOW CAN YOU REVIEW, UPDATE, OR DELETE THE DATA WE COLLECT FROM YOU?
Based on the applicable laws of your country, you may have the right to request access to the personal information we collect from you, change that information, or delete it in some circumstances. To request to review, update, or delete your personal information, you may email Kevin at me@kpirnie.com or by post to:
Kevin C. Pirnie
22 Orlando St.
Feeding Hills, MA 01030
United States of America
