NASA's Kepler Discovers Multiple Planets Orbiting A Pair Of Stars | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date

Airborne Unlimited-
Monday

Airborne-Unmanned w/AUVSI-
Tuesday

Airborne Unlimited-
Wednesday

AMA Drone Report-
Thursday

Airborne Unlimited-
Friday

Airborne On ANN

Airborne 01.15.18

Airborne-UnManned 01.16.18

Airborne 01.17.18

AMA Drone Report 01.18.18

Airborne 01.19.18

Airborne-YouTube

Airborne 01.15.18

Airborne-UnManned 01.16.18

Airborne 01.17.18

AMA Drone Report 01.18.18

Airborne 01.19.18

Tue, Sep 04, 2012

NASA's Kepler Discovers Multiple Planets Orbiting A Pair Of Stars

First Time Planets 'Seen' Orbiting Two Suns

NASA's Kepler mission has discovered multiple transiting planets orbiting two suns for the first time. The system, known as a circumbinary planetary system, is 4,900 light-years from Earth in the constellation Cygnus. Coming less than a year after the announcement of the first circumbinary planet, Kepler-16b, this discovery proves that more than one planet can form and persist in the stressful realm of a binary star. The discovery demonstrates the diversity of planetary systems in our galaxy.

Astronomers detected two planets in the Kepler-47 system, a pair of orbiting stars that eclipse each other every 7.5 days from our vantage point on Earth. One star is similar to the sun in size, but only 84 percent as bright. The second star is diminutive, measuring only one-third the size of the sun and less than 1 percent as bright. "In contrast to a single planet orbiting a single star, the planet in a circumbinary system must transit a 'moving target.' As a consequence, time intervals between the transits and their durations can vary substantially, sometimes short, other times long," said Jerome Orosz, associate professor of astronomy at San Diego State University and lead author of the paper. "The intervals were the telltale sign these planets are in circumbinary orbits."

The inner planet, Kepler-47b, orbits the pair of stars in less than 50 days. While it cannot be directly viewed, it is thought to be a sweltering world, where the destruction of methane in its super-heated atmosphere might lead to a thick haze that could blanket the planet. At three times the radius of Earth, Kepler-47b is the smallest known transiting circumbinary planet. The outer planet, Kepler-47c, orbits its host pair every 303 days, placing it in the so-called "habitable zone," the region in a planetary system where liquid water might exist on the surface of a planet. While not a world hospitable for life, Kepler-47c is thought to be a gaseous giant slightly larger than Neptune, where an atmosphere of thick bright water-vapor clouds might exist.

"Unlike our sun, many stars are part of multiple-star systems where two or more stars orbit one another. The question always has been -- do they have planets and planetary systems? This Kepler discovery proves that they do," said William Borucki, Kepler mission principal investigator at NASA's Ames Research Center in Moffett Field, Calif. "In our search for habitable planets, we have found more opportunities for life to exist."

To search for transiting planets, the research team used data from the Kepler space telescope, which measures dips in the brightness of more than 150,000 stars. Additional ground-based spectroscopic observations using telescopes at the McDonald Observatory at the University of Texas at Austin helped characterize the stellar properties. The findings are published in the journal Science. "The presence of a full-fledged circumbinary planetary system orbiting Kepler-47 is an amazing discovery," said Greg Laughlin, professor of Astrophysics and Planetary Science at the University of California in Santa Cruz. "These planets are very difficult to form using the currently accepted paradigm, and I believe that theorists, myself included, will be going back to the drawing board to try to improve our understanding of how planets are assembled in dusty circumbinary disks."

(NASA image)

FMI: www.nasa.gov/kepler

Advertisement

More News

Airborne-Unmanned 01.16.18: AUVSI Trusted Operator, Typhoon H Plus, Intel

Also: Drones Tracking Illegal Dumping, Arctic UAS, Airspace Situational Awareness, TrueView R20 AUVSI has announced the appointment of leading industry stakeholders to serve on a s>[...]

Airborne 01.19.18: Airbus A380 Reprieve, FAA Sued, FAA Defends Drop Zone

Also: Skydiving Museum, Nature Air Suspended, IAC 2017 Collegiate Program, StandardAero Ceases LAX Ops You can hear the sigh of relief from across the Atlantic... After several mon>[...]

AMA Drone Report 01.18.18: 1 Million Drone Reg's, Autel EVO, FAA Sued Again

Also: New DJI Mavic?, SureFly Not Yet, Drones Tracking Illegal Dumping, 'Illicit' Drone Video The FAA has registered a million drones, the DOT announced last week at CES in Las Veg>[...]

Aero-News: Quote of the Day (01.21.18)

“Being in structural maintenance kind of centers around building parts for the aircraft. I took a personal interest in the project because it’s not something we normall>[...]

ANN's Daily Aero-Term (01.21.18): Obstacle Departure Procedure (ODP)

Obstacle Departure Procedure (ODP) A preplanned instrument flight rule (IFR) departure procedure printed for pilot use in textual or graphic form to provide obstruction clearance v>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2018 Web Development & Design by Pauli Systems, LC