Because the period of an object does not depend on its mass, comets’ orbital periods remain unchanged due to mass loss.

These massive currents carry material on a journey through and around star-forming galaxies before they settle and form stars ...

The jets of a supermassive black hole are one of the cosmos’ greatest spectacles — and also one of its greatest mysteries. These beams of ionized matter burst forth from the cores of galaxies ...

After exploding, the craft sent blazing debris across the sky and forced multiple aircraft flying over and near the Caribbean ...

The lanes and clouds of dust in the star-forming Orion Nebula (M42) reveal a dark dimension to this familiar object.

Found less than a billion years after the Big Bang, these massive objects are upending astronomers’ timeline for how early ...

The phenomenon of a Full Moon arises when our planet, Earth, is precisely sandwiched between the Sun and the Moon. This alignment ensures the entire side of the Moon that faces us gleams under ...

Plus: Saturn’s moon Iapetus is visible, our Moon passes the bright star Spica, and Mars skims south of Pollux in Gemini in ...