Our solar system's latest and only third known interstellar visitor is becoming more fascinating by the minute. Spotted in early July, the object, dubbed 3I/ATLAS, is believed to be a comet. It's ...

These drift through the frigid outermost reaches of the solar system at distances of up to 200,000 AU (approximately 3 Light Years).

Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper belt.

An illustration of the scale of our solar system. Distances here are measured in astronomical units (AU). (Credit: NASA) Click on an article about space on Discover, and you’ll likely run into a ...

Solar Orbiter has identified the Sun’s dual “engines” for superfast electrons: explosive flares and sweeping coronal mass ...

Astronomers talk about solar system distances in terms of “astronomical units.” An astronomical unit, or one AU, is the distance from Earth to the sun.

This invisible boundary, located about 100 astronomical units (AU) from the Sun (one AU is the distance from Earth to the Sun), is where the solar wind slows down dramatically after running into ...

The interstellar network is sustained by the explosive life cycles of stars that generate powerful solar winds. Past research ...

Astronomers have picked up evidence of an Earth-sized world, distinct from the previously hypothesised Planet Nine and Planet ...

The European Space Agency-led Solar Orbiter mission has split the flood of energetic particles flung out into space from the ...