Home » News & Blogs » Low-Density Planet with a Non-Periodic Orbit
Bookmark and Share
Beyond Earthly Skies

Low-Density Planet with a Non-Periodic Orbit

14 Feb 2015, 22:00 UTC
Low-Density Planet with a Non-Periodic Orbit
(200 words excerpt, click title or image to see full post)

Kepler-289 c is a newly discovered low-mass, low-density planet in orbit around a Sun-like star. Its orbit lies between two other known planets: Kepler-289 b (inner planet) and Kepler-289 d (outer planet). Perturbations from its inner and outer planetary siblings cause the 66 day orbit of Kepler-289 c to vary by as much as ~5 hours. For comparison, the orbital period of Earth varies by only one second or so.The non-periodic orbit of Kepler-289 c allows it to elude automated computer algorithms that search through the light curve data collected by NASA’s planet-hunting Kepler space telescope. In fact, the discovery of Kepler-289 c was made possible by enlisting the help of citizen scientists who visually scan through the light curve data collected by Kepler as part of the Planet Hunters program. Computers can’t find the unanticipated, but humans can.Kepler-289 b, the inner planet, has an orbital period of 35 days, 7.3 times Earth’s mass, 2.15 times Earth’s radius and receives about 25 times more insolation than Earth gets from the Sun. Kepler-289 d, the outer planet, has an orbital period of 126 days, 132 times Earth’s mass, 11.6 times Earth’s radius and receives about 4.4 times more insolation than Earth ...

Latest Vodcast

Latest Podcast

Advertise PTTU

NASA Picture of the Day

Astronomy Picture of the Day

astronomy_pod