��è��Ƶ

Skip to content

This new NASA/ESA/CSA James Webb Space Telescope Picture of the Month features a rare cosmic phenomenon called an Einstein ring. What at first appears to be a single, strangely shaped galaxy is actually two galaxies that are separated by a large distance. The closer foreground galaxy sits at the center of the image, while the more distant background galaxy appears to be wrapped around the closer galaxy, forming a ring.?? Einstein rings occur when light from a very distant object is bent (or ???lensed???) about a massive intermediate (or ???lensing???) object. This is possible because spacetime, the fabric of the Universe itself, is bent by mass, and therefore light travelling through space and time is bent as well. This effect is much too subtle to be observed on a local level, but it sometimes becomes clearly observable when dealing with curvatures of light on enormous, astronomical scales, such as when the light from one galaxy is bent around another galaxy or galaxy cluster. When the lensed object and the lensing object line up just so, the result is the distinctive Einstein ring shape, which appears as a full circle (as seen here) or a partial circle of light around the lensing object, depending on the precision of the alignment. Objects like these are the ideal laboratory in which to research galaxies too faint and distant to otherwise see. The lensing galaxy at the center of this Einstein ring is an elliptical galaxy, as can be seen from the galaxy???s bright core and smooth, featureless body. This galaxy belongs to a galaxy cluster named SMACSJ0028.2-7537. The lensed galaxy wrapped around the elliptical galaxy is a spiral galaxy. Even though its image has been warped as its light travelled around the galaxy in its path, individual star clusters and gas structures are clearly visible. The Webb data used in this image were taken as part of the Strong Lensing and Cluster Evolution (SLICE) survey (programme 5594), which is led by Guillaume Mahler at University of

Space

I'm calling it – 2026 is going to be the year of the galaxy

We are going to be getting a lot of exciting new information about galaxies in 2026, says Chanda Prescod-Weinstein, who can't wait to see what it can tell us

Comment

Space

The first commercial space stations will start orbiting Earth in 2026

��è��Ƶ

The best new science fiction books of January 2026

Comment

The best new science fiction books of January 2026

Culture

Our verdict on The Player of Games: Iain M. Banks is still a master

Comment

Our verdict on The Player of Games: Iain M. Banks is still a master

Culture

The challenges of writing from the perspective of a sex robot

Comment

The challenges of writing from the perspective of a sex robot

Culture

Read an extract from Annie Bot by Sierra Greer

Technology

Read an extract from Annie Bot by Sierra Greer

Culture

Image of night sky

Space

Star that seemed to vanish more than 130 years ago is found again

��è��Ƶ

Space

BepiColombo mission will start to unpick Mercury's secrets in 2026

��è��Ƶ

Space

NASA's Artemis II mission aims to return astronauts to moon in 2026

��è��Ƶ

The century-long hunt for the gigantic meteorite that vanished

Space

The century-long hunt for the gigantic meteorite that vanished

A soldier returned from the Sahara desert in 1916 with a wild story about a meteorite that dwarfed all others. Over 100 years of hunting yielded nothing – but now twin brothers think they have solved the puzzle

Features

Technology

How not to misread science fiction

Comment

Space

The best space pictures of 2025, from supernovae to moon landings

��è��Ƶ

Space

The essential guide to proving we’ve found alien life

Features

Video

Author Ken MacLeod on the life and work of the late Iain M. Banks

Video