Chris Gunn—NASA “Part of our core science for Roman is to do surveys that allow us to measure the properties of very large numbers of galaxies throughout cosmic history,” says Schlieder ...

The halo, known as an Einstein ring, encircles a galaxy 590 million light-years away, considered close by cosmic standards. A light-year is 5.8 trillion miles. Telescopes spy a monster radio jet ...

Pulsars – rapidly spinning neutron stars – serve as cosmic clocks to reveal the elusive waves through tiny variations in their timing. Using this data set, Chen led a team in France at the ...

The plasma was opaque to light, and density waves reverberated through it. Then, when the cosmic clock ticked over to 379,000 years, the universe had cooled sufficiently for the electrons and ...

Then, when the cosmic clock ticked over to 379,000 years, the universe had cooled sufficiently for the electrons and nuclei to combine and form whole atoms. The plasma turned into a fog of neutral ...

However, Lane and his colleagues tested an alternative idea called the timescape model, which suggests that the apparent acceleration could be a byproduct of cosmic structures like voids — vast ...

What is the structure of our physical reality? Physicists have long imagined space and time interweaving into “space-time”, the metaphorical fabric that underlies the cosmos. But there may be ...

That timeline means that this supermassive black hole, estimated to have a mass around 200 million times that of the sun, existed in a vital cosmic period known as the "epoch of reionization." ...

Stargazers are in for a cosmic treat as six planets align in a breathtaking display known as a planetary parade. This astronomical event is set to unfold across the night sky, showcasing Venus ...