The Einstein zig-zag could help answer big questions, like how fast the universe is expanding and what dark energy really is. At the heart of this system, labeled J1721+8842, lies a single quasar.

Despite its abundance, dark matter remains one of the most elusive components in cosmology. Astronomers hope that the Roman ...

1916: First day of the Battle of the Somme: the British Army suffers its worst day, losing 19,240 men. 1920: French tennis superstar Suzanne Lenglen beats Dorothea Chambers 6-3, 6-0 to win the ...

"We will push the limits of what we can observe, and use every gravitational lens we detect with Roman to pin down the ...

Using the James Webb Space Telescope, scientists found a dusty disk surrounding the dying white dwarf creating the famous Ring Nebula.

These images were acquired on 21 May 2025 during the telescope’s ... Extremely rare ‘Einstein ring’ discovered close to Earth Extremely rare ‘Einstein ring’ discovered close to Earth.

Star names Comments by (from top to bottom) Anton Zeilinger, Alain Aspect, Serge Haroche and David Wineland in the Helgoland "gold book". (Courtesy: Matin Durrani) The first session at the Helgoland ...

[3] Einstein rings modulated by wavelike dark matter from anomalies in gravitationally lensed images. Nature Astronomy (2023). [4] Experimental observation of violent relaxation .