ASTR 1101 Chapter : CW22
Document Summary
Classwork #22 (1) the star hd37124 has about half the luminosity of our sun and is at a distance of 140 light years. It has three discovered planets, all ~0. 6 jupiter-masses, with the innermost having an orbital radius of 0. 6au. If this jupiter-like planet has small ice/rock moons around it (much like our jupiter has the. The moon has a low gravity which cannot hold atmosphere at the earth"s temperature. [think how the galilean moon don"t hold at atmosphere at jupiter"s cold temperature. ] But this is not a sure deal, as we know that titan [around saturn] does have a modest atmosphere. Nice, earth-like". (2) corot 7-b is a planet around a solar-like star 480 light years away. It is seen to eclipse its star (pass in front of it) every 21 hours, so its orbital period is 0. 002 years. From the observed time it take to enter the disk, the planet is 1. 6x the size of.
