By studying how light from eight distant quasars is gravitationally lensed as it propagates towards Earth, astronomers have ...

Let's turn the sun into a telescope. In fact, we don't have to do any work—we just have to be in the right spot. But how can the sun be a telescope? The sun is not a mirror, but it is a lens. And we ...

Overlay of the infrared emission (black and white) with the radio emission (colour). The dark, low-mass object is located at ...

Galaxy clusters are formed by a dense packing of many galaxies, making them the most massive structures in the universe.

This Hubble Wide Field Camera 3 image demonstrates the immense effects of gravity; more specifically, it shows the effects of gravitational lensing caused by a galaxy cluster called SDSS J1152+3313.

The universe’s accelerating expansion has long puzzled physicists. For decades, dark energy, an unseen force thought to make ...

The vast majority of matter is dark – invisible until it is detected only through its gravitational effects. The newly discovered object could be a clump of dark matter, or it could also be a compact, ...