Dust around distant stars is revealing clues to collisions powerful enough to reshape young planets. Astronomers using the ...

In short: A new study, yet to be peer reviewed, builds on years of evidence suggesting a ninth planet exists in the Solar System. Despite this, researchers have not yet seen it directly using ...

Once upon a time, there was a solar system. In it lived four small rocky planets called Mercury, Venus, Earth and Mars. Four big gassy planets lived there too: Jupiter, Saturn, Uranus and Neptune. The ...

First discovery of a planet orbiting its host star so closely that the planet's magnetic field triggers radiation bursts from ...

On a clear night, it dominates the sky, bright enough to cast shadows and large enough for dark patches and surface features to be seen without any equipment. It appears close, almost familiar. For ...

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 ...

If you were going to search for life around planets outside our Solar System, you'd look for it around rocky worlds like ours that orbit the most common type of star in the cosmos. It just so happens ...

Astronomers say they have directly detected the first-ever radio emission from a planet outside the solar system. The signal, ...

Experts have for years argued that a distant ninth world in our Solar System called Planet X orbits the Sun in a region well beyond Neptune. Also known as Planet Nine, the idea was put forward in 2016 ...

Over the past 250 years, the number of "planets" in our solar system has ranged from six to nine — and, briefly, even 11 — depending on what astronomers knew at the time and how they defined a planet.

But the conversation hasn’t been limited to scientists. A separate discussion has been taking place among a passionate group of stargazers who have been looking for what they believe is the lost ...

NASA’s Nancy Grace Roman Space Telescope launched on Aug. 30, 2026, beginning a journey that will take it about a million miles from the Earth. Once there, Roman will study some of the biggest ...