Astronomers discovered largest known exoplanet
Posted: Wed, Aug 8, 2007, 7:42 AM ET (1142 GMT)
Astronomers announced this week that they have discovered an extrasolar planet with the largest radius measured to date, making the planet's density unexpectedly low. The planet, designated TrES-4, closely orbits the star GSC02620-00648, 1,435 light-years away. The planet was discovered by detecting periodic decreases in the star's brightness as the planet transited the star's disk as seen from Earth. Those studies found that the planet has a radius 1.67 times that of Jupiter, the largest radius of any planet so far measured. Separate observations found that the planet's mass is only 0.84 times that of Jupiter, giving the planet a density of 0.22 grams per cubic centimeter, too low to be explained by current models of giant planets.
Astronomers announced this week that they have discovered an extrasolar planet with the largest radius measured to date, making the planet's density unexpectedly low. The planet, designated TrES-4, closely orbits the star GSC02620-00648, 1,435 light-years away. The planet was discovered by detecting periodic decreases in the star's brightness as the planet transited the star's disk as seen from Earth. Those studies found that the planet has a radius 1.67 times that of Jupiter, the largest radius of any planet so far measured. Separate observations found that the planet's mass is only 0.84 times that of Jupiter, giving the planet a density of 0.22 grams per cubic centimeter, too low to be explained by current models of giant planets.
Related Links:
| <<previous article | next article>> |
|
news in brief
|
|
New Virgin Galactic spaceplane arrives at Spaceport America
Posted: Sat, Oct 31 10:38 AM ET (1438 GMT) |
|
news links
|
|
Monday, November 2
Forum: Springs’ space future is bright without Space Command
Colorado Springs Gazette — 5:37 am ET (1037 GMT) S. Korea's Air Force to participate in U.S.-led space war game for 1st time
Yonhap News — 5:35 am ET (1035 GMT) The growing threats that make the Space Force essential
Washington Examiner — 5:33 am ET (1033 GMT) Lawfare against Elon Musk could affect the Artemis program
The Hill — 5:26 am ET (1026 GMT) Southland's global space company won't write down military policy
The Southland App (NZ) — 5:25 am ET (1025 GMT) |
