Perihelion is the point at which an orbiting body is closest to the sun. The word comes from Greek and literally means around ...

Scientists, peering 7 billion years back into the past, have discovered something that may help us better understand the ...

At the beginning of the exoplanet age, the goals were fairly simple. The first was to find as many of them as possible to ...

Wormholes are often imagined as tunnels through space or time—shortcuts across the universe. But this image rests on a ...