John Casani, who has died aged 92, was an American spaceflight engineer who led the teams that pioneered Nasa’s explorations ...

Voyager 1, Earth’s farthest spacecraft, has been on an extraordinary journey for over 45 years, exploring uncharted ...

Astronomers tracking an interstellar object flying through the solar system think it comes from a star at least 8 billion ...

I/ATLAS might be over 7 billion years old, a new study reports, which would make it the oldest comet known. But experts caution we need more data.

NASA’s Voyager 1 and Voyager 2 spacecraft delivered groundbreaking data that expanded our understanding of the solar system’s outermost edge,a region scientists call the "cosmic coastline." This is ...

In our analysis this week, we look at how NASA's proposed budget would slash the agency's science division by nearly 50%.

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

Solar systems mostly keep to themselves. What’s ours is ours and what’s not is not. Stars are simply too far from each ...

The distant planet Neptune stands still against the background stars of Pisces in the early-morning sky, still visible close ...

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed.

But in space or on the Moon, there are no power lines, no sunlight at night and no backup grid. Every system — from life ...

Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts ...