Just about everyone has heard of NASA’s Hubble Space Telescope — not too surprising considering that it has been with us for ...

During evenings in April 2025, there are two bright planets visible. The departure of Venus has left Jupiter, in the west at ...

One of the first verified predictions of general relativity is the gravitational deflection of starlight. The effect was ...

While it was getting ready to power down its Gaia spacecraft, the European Space Agency encountered some unusual resistance.