Mars-habitable or not?
The surface of Mars is barren and inhospitable, but perhaps it wasn't always that way. Billions of years ago, when life emerged on Earth, the climate of Mars could have been Earth-like as well, with a thicker atmosphere than today and oceans of liquid water.
Asteroids
Ceres has the shape of a flattened sphere with an equatorial radius of 490 km and a polar radius of 455 km, equivalent in volume to a sphere with a diameter of 940 km—i.e., about 27 percent that of Earth's Moon.
SUN-the star!
The Sun is the star at the center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion
Pluto-the dwarf planet
It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume
Eclipses
It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume
Space station
The International Space Station Program brings together international flight crews, multiple launch vehicles, globally distributed launch and flight operations,