Using NASA's Transiting Exoplanet Survey Satellite (TESS), astronomers have discovered that aging stars in their so-called ...

For the first time in more than five years, humanity has launched a mission to Mars — but it won't be arriving at the Red ...

Astronomers using the European Space Agency's XMM-Newton space observatory and the LOFAR telescope have definitively spotted ...

At a young age, we're told how the sun warms Earth and makes life possible. That idea sticks with most of us for life. But ...

Copernicus proved the Earth and other planets orbit the sun, challenging centuries of belief and risking persecution for ...

Astronomers have discovered that aging stars may be devouring their closest giant planets as they swell into red giants.

The Sun, our nearest celestial neighbor, is undeniably a star, not a planet, as centuries of astronomical observations have ...

Researchers analyzed nearly half a million nearby star systems to understand how giant planets fare as their stars expand ...

Is a sun a star or a planet? While science now agrees the sun is a star, new telescopes may soon challenge how we define ...

Using data from NASA’s TESS mission, scientists can estimate the size (radius) of potential planets orbiting distant stars. However, to verify that these objects are truly planets and not low-mass ...

When stars like the Sun run out of hydrogen in their cores, fusion slows and the outer layers balloon outward. The star can ...