Astronomers discover ancient solar system
Posted: Wed, Jan 28, 2015, 7:36 AM ET (1236 GMT)
Astronomers announced Tuesday the discovery of a solar system with five planets estimated to be 11 billion years old, the oldest solar system yet found. The planets orbit Kepler-444, a star 117 light-years from the Earth and about 25 percent smaller than the Sun. The star has five planets with sizes estimates to be between that of Mercury and Venus, all orbiting very close to the star. Astronomers calculated the star's age, based on measurements of its oscillations, at 11.2 billion years old, making the star the oldest one known to have planets. It also indicates that planetary systems existed within a few billion years after the Big Bang.
Astronomers announced Tuesday the discovery of a solar system with five planets estimated to be 11 billion years old, the oldest solar system yet found. The planets orbit Kepler-444, a star 117 light-years from the Earth and about 25 percent smaller than the Sun. The star has five planets with sizes estimates to be between that of Mercury and Venus, all orbiting very close to the star. Astronomers calculated the star's age, based on measurements of its oscillations, at 11.2 billion years old, making the star the oldest one known to have planets. It also indicates that planetary systems existed within a few billion years after the Big Bang.
Related Links:
| <<previous article | next article>> |
|
news in brief
|
|
|
|
news links
|
|
Monday, May 25
A milestone for HKSAR on Shenzhou XXIII
China Daily — 3:29 am ET (0729 GMT) Hong Kong’s first astronaut Lai Ka-ying among Shenzhou-23 crew entering Tiangong space station
South China Morning Post — 3:27 am ET (0727 GMT) Orbital data centres, extraterrestrial energy: Detailing Musk’s ambitions with $1.75 bn SpaceX IPO
Indian Express — 3:26 am ET (0726 GMT) SpaceX’s IPO Is a Bet Gravity Doesn’t Apply to Elon Musk
Wall Street Journal — 3:22 am ET (0722 GMT) SpaceX's galaxy math
Axios — 3:22 am ET (0722 GMT) |
