In our solar system, Earth is one of but eight planets – nine if you really want to count Pluto – and the only one remotely hospitable to life. But look beyond our sun's gravitational pull into the ...

The extrasolar entity is hurtling toward the inner solar system at speeds of more than 130,000 mph (210,000 km/h) and is expected to reach its closest point to the sun in late October. (The object ...

The European Space Agency is making use of spacecraft designed for Mars and Jupiter missions to track interstellar comet 3I/ATLAS as it continues its journey through our solar system. First spotted in ...