Astronomers have been confounded by recent evidence that the universe expanded at different rates throughout its life. New ...

Because we haven't found anything yet, we've started to wonder if dark matter might be lighter or heavier than we thought.

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

The Universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous -- and highly debated -- results had shown: The Universe is expanding faster than predicted by ...

This signal, known as the 21 cm line, has been detected since the 1950s and is used widely in astronomy, but it hasn’t been definitively spotted from the early universe. The radio signal arises ...

Astronomers have struggled with finding ultra-faint dwarf galaxies far enough from the Milky Way's influence, making these ...

The atmosphere, a thin veil of molecules enveloping Earth, reaches about 20 miles (32 kilometers) above the planet's surface.

When we turn to “complex” extraterrestrial life or “intelligent” aliens, our results were 67.4 percent agreement, and 58.2 ...

Chile's Atacama Desert is home to some of the best Earth-based observatories, though an energy company is throwing a wrench ...

An international team led by astronomers at Leiden University has shown in laboratory experiments that sulfur can bind with ...

The James Webb Space Telescope is much larger than the Hubble and instead of orbiting the Earth, operates from a stationary ...

Astronomers have detected an intensely brightening and dimming quasar that may help explain how some objects in the early universe grew at a highly accelerated rate. The discovery is the most distant ...