This week see many special celestial sights, from a bright comet and a solar eclipse to a bright Venus and the possibility of ...

Asteroid 2022 NX was a short-lived mini-moon in 1981. It quickly left our planet’s grasp, before returning as a mini-moon in 2022. It’s estimated that it will return as such in 2051 once again.

"Planet spotting on a crystal clear night ... "I'm in my back garden and I can see a very nice little crescent Moon, to the top left and just above it I can see Mars, which has a lovely red ...

Taking off no earlier than October 10, the spacecraft will repeatedly buzz Europa in search of water, energy and organic compounds.

October's full moon will be joined by four of the naked-eye planets. Venus will be the first ... with Vega below and to the right of Deneb. To the left of both and farther toward the horizon ...

All this left the Red Planet as cold and barren and apparently lifeless as the moon. Mars still has an atmosphere, but its pressure is 100 times less than Earth's and it's almost entirely composed ...

But it will be a satellite of the Earth, or at least until Nov. 25, when it will slip out of our planet’s gravitational grasp ...

For the first time, NASA is journeying to this mysterious moon to determine if it might be able to host alien life.

Understanding how the Earth and moon formed is important for piecing together the ... before the planets formed—and pieces of asteroids and planetesimals left behind by the planet-building process.

The sixth largest and hottest planet in the solar system ... shining at magnitude -3.9, above the left of the crescent moon. On Thursday, September 5, a brightening 7%-lit waxing crescent moon ...

At magnitude –2.3, the planet far outshines the 1st-magnitude ... stars of Pisces’ Circlet asterism, with the Moon standing some 5° to the left of Lambda (λ) Piscium, the southeasternmost ...

The moon, by contrast ... There are no rocks from the Hadean left on Earth, and the planet's early atmosphere is a mystery. The sun, a younger star then, was less luminous, raising questions ...