NASA's James Webb Space Telescope recently zeroed in on the Bullet Cluster—delivering highly detailed images that show a greater abundance of extremely faint and distant galaxies than ever before.

Matter is defined as that which 1) has mass and 2) has volume or takes up space. Mass is an intrinsic property whose base SI unit is the kilogram (kg).

Inspired by superconductivity, a strange new theory that seeks to explain dark matter might explain dark energy, too ...

Dark matter, although not visible, is believed to make up most of the total mass of the universe. One theory suggests that ...

Learn about dark matter and dark energy. A simulation of the dark matter distribution in the universe 13.6 billion years ago. Illustration courtesy Volker Springel, Max Planck Institute for ...

Astronomer Vera Rubin, now honored on a U.S. quarter, transformed our understanding of the universe by uncovering powerful ...

M ost of the matter in our universe is invisible. We can measure the gravitational pull of this “dark matter” on the orbits of stars and galaxies. We can see the way it bends light around ...

Another clue about the whereabouts of the missing matter in the Universe has just emerged from amid the largest local cosmic ...

Around 68 percent of the remaining mass is dark energy, with just five percent left to ordinary “baryonic” matter, which are the objects we can directly observe.

The latest measurement pushes the possible mass of the neutrino lower than the previous limit set in 2022 by the KATRIN collaboration, of no more than 0.8 electronvolts. It is also nearly twice as ...

But as usual in science, there's more to the story. Forces and Fields On human scales of mass and distance, matter obeys the laws of motion described by Sir Isaac Newton.