Though the planets are always “aligned,” seeing more than four in the sky is more uncommon. February’s lineup is a chance to ...

There are many obstacles to overcome before humans can set foot on Mars, including problems surrounding launch mass and ...

Orbital dynamics show that President Trump’s pledge to land astronauts on Mars couldn’t happen until 2029 at the earliest.

Mars will appear to make an ultraclose approach to the moon on Sunday, after Jupiter had a turn earlier this week. Here's how to get the best view of the rare conjunction.

Increasingly crowded orbits full of satellites and debris pose potential hazards for services on Earth, and need regulation.

Because the Moon is over a quarter the diameter of Earth, the Earth-Moon system is often cited as the pairing in our Solar ...

NASA has plans to launch the first deep space station for humans to live long-term. Is it a necessary step to Mars?

Mining ocean resources needed for electric cars and other devices is currently a hot issue of dispute. Final resolution of ...

I pick out North America’s celestial highlights for the week ahead (which also applies to northern hemisphere mid-northern ...

PT5, a near-Earth object discovered last year, has captivated scientists with its potential lunar origins. Likely ejected ...