The constellation Gemini is easy to spot in the northeastern sky.

Pegasus has some interesting galaxies and deep-space objects.

The bull is hard to miss as it charges through the northern winter sky. It's one of the most prominent and visible of all of the constellations.

Jupiter has so many moons it could almost qualify as its own solar system.

Jupiter’s fifth moon is the most volcanically active body in the solar system.

Many cultures have recognized this constellation as the Lion.

Pisces is one of the largest constellations, and also one of the faintest.

Sally Ride was the first American woman to go into space.

Aquarius is best viewed in the fall. The constellation's stars are not very bright.

The Orion constellation is one of the most prominent star patterns in the sky.

Astronomer Giovanni Cassini discovered four of Saturn's moons, determined the distance from Earth to Mars and made successful measurements of longitude.

This faint constellation is the only one named for an inanimate object.

Ophiuchus is a fairly large and rambling constellation, but it is one of the least well-known.

One of the dragon constellation's stars used to be the North Star

This is the dimmest constellation of the Zodiac.

This large constellation contains the bright star Spica and many exoplanets and deep space objects.

Also known as Capricorn, this is one of the faintest constellations.

This large constellation contains the most stars with known planets. It is the 15th largest constellation overall.

The Scorpius constellation comprises some of the brightest stars in the sky.