The mirror on the James Webb Space Telescope is fully aligned and producing incredibly sharp images, like this test image of a star.
NASA/STScI via Flickr
It has taken eight months to test and calibrate all of the instruments and modes of the James Webb Space Telescope. A scientist on the team explains what it took to get Webb up and running.
Some of the MeerKAT’s 64 dishes, which astronomers use to collect huge amounts of data.
© South African Radio Astronomy Observatory (SARAO)
Complementary science will be at the heart of the Square Kilometre Array.
Jayanne English using data from MeerKAT and the Dark Energy Survey
Next-generation radio telescopes unravel the mysteries of ghostly circles in the sky.
Concept of a black hole acting as a lens on background light.
Some black holes are isolated in space and therefore near impossible to detect.
Some stars travel at high speeds through the universe and sometimes leave spectacular clouds of dust and gas in their wake.
NASA, ESA and R. Sahai (NASA's Jet Propulsion Laboratory)
Hypervelocity stars were discovered only 15 years ago and are the closest things in existence to real shooting stars. They travel at millions of miles per hour, so fast that they can escape from galaxies.
Anyone with an internet connection can search the universe and possibly discover never-before-seen galaxies.
James Webb Space Telescope mirrors undergoing cryogenic testing.
JSWT may be able to discover signs of life on planets around other stars.
Artist’s impression of the James Webb telescope after deployment of the mirror and sunshield.
It will be a nail-biting wait as scientists launch and deploy the most complex observatory ever built.
A composite image of the data collected by the ALMA telescope in Chile, showing spiral galaxies in the Virgo Cluster.
ALMA (ESO/NAOJ/NRAO)/S. Dagnello (NRAO)/T. Brown (VERTICO)
Studying the extreme environment of the Virgo Cluster — which comprises thousands of galaxies — helps us learn what factors can affect and start or stop star formation.
There’s a lot we don’t know about galaxies.
We have to look back to the Big Bang to find out.
Flouride is created by Wolf–Rayet stars, here seen in the Milky Way by the Hubble Space Telescope.
Tracing the cosmic origin of toothpaste, scientists got a glimpse into the surprising chemistry of early galaxies.
A telescope in the outer solar system would be able to do unique science that is impossible closer to the Sun.
Such a mission could be developed soon, allowing astrophysicists to take selfies of the solar system and use the Sun’s gravity as a lens to peer deep into space.
Hubble took pictures of the oldest galaxies it could – seen here – but the James Webb Space Telescope can go back much farther in time.
The James Webb Space Telescope is set to launch into orbit in December 2021. Its mission is to search for the first light to ever shine in the universe.
NASA, ESA and M. Kornmesser
Did we observe the most distant gamma ray burst yet seen, or was it something closer to home?
Astronomers have found a way to estimate the number of stars in the universe.
Comstock Images via Getty Images
Scientists have a good estimate on the staggering number of stars in the universe.
MeerKAT, the precursor to the massive Square Kilometre Array, allows astronomers to gather huge amounts of data about galaxies.
Photo by Jaco Marais/Foto24/Gallo Images/Getty Images
Technology is allowing astronomers to study and analyse galaxies in far more detail than was previously possible.
Jayanne English/EMU/Dark Energy Survey
Australia’s ASKAP radio telescope probes the Universe more deeply than ever before, revealing unseen features of the cosmos.
Event Horizon Telescope project/Nature Astronomy
Astronomers have taken a close-up look at the jets of plasma streaking away from a supermassive black hole - one of the strangest and most energetic features of galaxies.
Artist illustration of an exoplanet.
dottedhippo/iStock via Getty Images
Billions of galaxies are in the universe, with billions of stars in every galaxy. Could billions of planets be out there too?
More than 60 images capturing huge expanses of sky are sent to us from Chile. Within them we can see thousands of bright spots. What do we find when we look closer?