Over 4.6 billion years ago, the early Earth emerged from a swirling disk of gas and dust encircling the young sun. This ...

If you want to get a quick snapshot of someone else's personality, then our handy guide to interpreting their Big 3 can help.

Scientists have shown that a "remelting event" more than 4.3 billion years ago "reset" the internal clock of most lunar rocks ...

But have you heard of a "black moon?" The label describes a rare second new moon in a month. Per the U.S. Naval Observatory, ...

Part of the Parker Solar Probe’s mission is to investigate why the sun’s atmosphere is millions of degrees hotter than the ...