Galaxies

The next year of science on the James Webb Space Telescope has been announced amid mounting budgetary uncertainty that could affect the unparalleled observatory

A long-simmering disagreement over the universe’s present-day expansion rate shows no signs of resolution, leaving experts increasingly vexed

The final results from the Atacama Cosmology Telescope offer the sharpest, most sensitive view of the early cosmos that anyone has ever seen

With radio and infrared telescopes, astronomers can pierce the dusty veil of our galaxy and map its farthest reaches

Strange x-ray pulses hint at a surprisingly long-lived white dwarf orbiting precariously close to a supermassive black hole

According to a tenet scientists call the cosmological principle, our place in space is in no way exceptional. But recent observations could overturn this long-held assumption

The celestial equivalent to latitude and longitude lets astronomers find their way across the heavens

The universe’s light-starved early epochs, as well as the first stars and galaxies, lie beyond the reach of conventional observatories but could be revealed by a new generation of radio telescope arrays

Andromeda and the Milky Way may collide, or they may safely swing past each other. Time will tell

A single-celled organism’s pathfinding reveals connections in the universe’s vast “cosmic web”

There’s more than one way for a star to die. Some go with a whimper, and some go with a very, very big bang

The cosmos is dark. The Lilly-Madau diagram reveals that it will become much darker still