Heat-1

Heat-1
Heat-1 is named for it's planets, all which are located hypothetically, inside the orbit of Mercury.

Star-
The Star is a G type star similar to our Sun.

Planets-

 * Heat b- Located so close to it's star most of it is liquified into lava, it is Mercury sized. The Star takes up a good half of the sky. Believed to have once been a large Protoplanet just beyond the frost line, a passing star sent it hurtling toward the orbit of Mercury. After a million years or so, it found stability in it's current orbit. It has a tenuous atmosphere created by the constant solar wind.
 * Heat c- Heat c is a hot jupiter the size of Uranus. The only thing protecting it is a weak magnetic field that is strengthened by one of it's larger moons.
 * Heat d- Heat d is a large, rocky world that a rotation period- (76 days) that is similar to it's revolution period, (81 days). As such, it's small, weak atmosphere allows it just enough heat to transfer to the part of the night side that never sees daylight. As such, it may harbor several cold lakes the size of Superior. It has one moon.