Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

The interstellar comet 3I/ATLAS was the third object ever discovered in our solar system that originated from another star system. Despite a viral conspiracy theory, NASA officials have repeatedly ...

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

Scientists are grappling with a cosmic mystery: why does the Universe behave differently on massive scales compared to our ...

The standard story of the origin of our solar system has gone like this: 4.6 billion years ago, a giant cloud of dust hung frozen in space. Then the explosion of a nearby star caused part of that dust ...

Rather than slowly condensing over millions of years, the first building blocks of Earth and other planets may have formed ...