Dark comets are comets that are so small, fast and/or chemically rare that they are difficult to see from Earth

The cosmos began expanding with the Big Bang but then around 10 billion years later it strangely began to accelerate thanks to a theoretical phenomenon termed dark energy. Credit: NASA One of science’s biggest mysteries is dark energy.

NASA astronauts Sunita "Suni" Williams and Barry "Butch" Willmore were expected to return home in February after their extended stay at the ISS, but NASA confirmed the two will be in space longer.

Dark matter's mass limit increased by an order of magnitude, impacting our understanding of the universe's invisible substance.

In case dark matter didn't seem mysterious enough, a new study proposes that it could have arisen before the Big Bang.

The Nancy Grace Roman Space Telescope team at NASA has completed the integration of the telescope and its instruments onto the carrier, a significant milestone in the assembly process. With the Coronagraph Instrument and the Optical Telescope Assembly in place,

Find out about the recent developments regarding the Roman Space Telescope and how they might bring us closer to understanding the universe.

Dark matter, an enigmatic and invisible substance that constitutes approximately 85% of the mass in the universe, remains one of the most compelling mysteries in modern physics. Despite its widespread presence in the cosmos,

Some of this stuff is known as mysterious dark matter, others are things like dark comets, which as their name suggests, are far more difficult to see from Earth than something like Tsuchinshan-Atlas.

A massive, energetic jet from Virgo A could help scientists understand how matter behaves around a black hole.

When it comes to particle physics, however, much of the action takes place in giant accelerators smashing particles together at the speed of light. These accelerators are sometimes humanmade and therefore live on Earth — other times, they're of the cosmic sort and exist in deep space.