Featured Research

from universities, journals, and other organizations

Astronomy Teams Find First Multi-Planet System, Other Than Our Own, Orbiting Star

Date:
April 16, 1999
Source:
National Science Foundation
Summary:
The first believed multiple planet system orbiting around a sun-like star has been found by independent teams of astronomers, including National Science Foundation (NSF)-supported researchers from San Francisco State University and from the Anglo-Australian Observatory.

The first believed multiple planet system orbiting around a sun-like star has been found by independent teams of astronomers, including National Science Foundation (NSF)-supported researchers from San Francisco State University and from the Anglo-Australian Observatory.

In 1996 San Francisco State's Geoffrey Marcy and R. Paul Butler of the Anglo-Australian Observatory detected a near Jupiter-sized planet orbiting the star Upsilon Andromedae.

Recently, the scientists, after analyzing 11 years of telescopic observations at Lick Observatory near San Jose, Calif., picked up signals of what appears to be two additional planets within the same system based on newly gathered data. The new data indicates there are at least a trio of planets orbiting this star, making the Upsilon Andromedae grouping the first solar system ever found that mimics our own.

These newly discovered planets are more distant from its star than the one discovered three years earlier. The middle planet is estimated at twice the size of Jupiter, and the outermost planet, four times Jupiter's mass. Both orbit its star in elliptical patterns, as in previously known discoveries of extrasolar planets.

Meanwhile, a second team of astronomers from the Harvard-Smithsonian Center for Astrophysics (CfA) in Cambridge, Mass., and from the NSF-supported High Altitude Observatory (HAO) in Boulder, Colo. found independent evidence of the two new planets using the Smithsonian's Whipple Observatory near Tuscon, Ariz.

Butler is the lead author of a paper that describes the trio of planets for the Astrophysical Journal. Contributing colleagues include Marcy, Debra Fischer of San Francisco State, Robert Noyes, Sylvain Korzennik, Peter Nisenson and Adam Contos, all of the CfA, and Timothy Brown of HAO.

"These planets are giants," James P. Wright, who heads special programs in astronomy for NSF's Division of Astronomical Sciences, said. "It's impressive that these results have been independently corroborated by these teams."

Editor's Note: For images, see http://www.physics.sfsu.edu/~gmarcy/planetsearch/upsand.html


Story Source:

The above story is based on materials provided by National Science Foundation. Note: Materials may be edited for content and length.


Cite This Page:

National Science Foundation. "Astronomy Teams Find First Multi-Planet System, Other Than Our Own, Orbiting Star." ScienceDaily. ScienceDaily, 16 April 1999. <www.sciencedaily.com/releases/1999/04/990416081259.htm>.
National Science Foundation. (1999, April 16). Astronomy Teams Find First Multi-Planet System, Other Than Our Own, Orbiting Star. ScienceDaily. Retrieved October 21, 2014 from www.sciencedaily.com/releases/1999/04/990416081259.htm
National Science Foundation. "Astronomy Teams Find First Multi-Planet System, Other Than Our Own, Orbiting Star." ScienceDaily. www.sciencedaily.com/releases/1999/04/990416081259.htm (accessed October 21, 2014).

Share This



More Space & Time News

Tuesday, October 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Comet Siding Spring Grazes Mars' Atmosphere

Comet Siding Spring Grazes Mars' Atmosphere

Newsy (Oct. 19, 2014) A comet from the farthest reaches of the solar system passed extremely close to Mars this weekend, giving astronomers a rare opportunity to study it. Video provided by Newsy
Powered by NewsLook.com
Latin America Launches Communications Satellite

Latin America Launches Communications Satellite

AFP (Oct. 17, 2014) Argentina launches a home-built satellite, a first for Latin America. It will ride a French-made Ariane 5 rocket into orbit, and will provide cell phone, digital TV, Internet and data services to the lower half of South America. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
This Week @ NASA, October 17, 2014

This Week @ NASA, October 17, 2014

NASA (Oct. 17, 2014) Power spacewalk, MAVEN’s “First Light”, Hubble finds extremely distant galaxy and more... Video provided by NASA
Powered by NewsLook.com
Saturn's 'Death Star' Moon Might Have A Hidden Ocean

Saturn's 'Death Star' Moon Might Have A Hidden Ocean

Newsy (Oct. 17, 2014) The smallest of Saturn's main moons, Mimas, wobbles as it orbits. Research reveals it might be due to a global ocean underneath its icy surface. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins