Redshift

Astronomers have discovered the oldest known spiral galaxy. It's thought be similar to what our own Milky Way galaxy looked like, 1 billion years after the Big Bang. The post Astronomers spy the oldest known spiral galaxy first appeared on EarthSky.

Planet demographics reveal a puzzling lack of worlds in a certain size range throughout the galaxy

The riddle of dark matter, which is thought to make up much of the universe, may be solved at last.

A new image from ESO's Very Large Telescope provides what these astronomers called "our clearest view yet" of a filament in the cosmic web. The post A filament of the cosmic web! Clearest image yet first appeared on EarthSky.

There's increasing evidence that astronomical theories don't match the observations. Is it time to rethink our story of how our universe came to be? The post MOND and more. Does the universe need a rethink? first appeared on EarthSky.

Astronomers with NASA and Caltech have found that a volcanic exomoon may be producing a cloud of sodium gas near a giant exoplanet 635 light-years away. The post Is there a volcanic exomoon orbiting this giant exoplanet? first appeared on EarthSky.

REBELS-25 existed as early as 700 million years after Big Bang, according to a paper published in the Monthly Notices of the Royal Astronomical Society.

This week, astronomers considered whether dark energy varies over cosmic timescales. Via neutron analysis, physicists revealed that some Early Iron Age swords were altered recently by swindlers in order to be more historically exciting. And a professor in New Jersey solved two fundamental problems that have baffled mathematicians for decades. Additionally, there were developments in children's crafting supplies,…

Astrononomers using the NASA/ESA/CSA James Webb Space Telescope have detected that GS-10578, a massive, quiescent galaxy at redshift of 3.064 (look-back time 11.7 billion years), is expelling large amounts of gas at speeds of about 1,000 km per second.

Measurements of cosmic expansion using Cepheid variable stars continue to create tension.

An international team of astronomers and astrophysicists studying data and imagery received from the James Webb Space Telescope (JWST) has found that light emitted from one of the earliest galaxies identified thus far, is due to continuing bursts from star formations.

The Euclid and XMM-Newton missions have combined to show the hidden, hot gas that fills an immense galaxy cluster 2.7 billion light-years away.

By measuring the motions of stars in the Draco dwarf galaxy, the Hubble Space Telescope was able to map the density profile of dark matter.

Using the James Webb Space Telescope, astronomers have witnessed the dramatic dance between a supermassive black hole-powered quasar and merging galaxies less than a billion years after the Big Bang.

So, you want to find the most distant objects that are out there in the Universe? So do astronomers and astrophysicists of all varieties. Only by looking to greater and greater distances —…

5 big lessons from JWST's new record-setting galaxy. A new all-time record! JWST's discovery of JADES-GS-z14–0 pushes the earliest galaxy ever seen to just 290 million years after the Big….

NASA's Nancy Grace Roman Telescope will hunt for the universe's first stars — or rather, what's left of them after they've been ripped apart by black holes.

Last week, the chief scientist of the James Webb Space Telescope, Jane Rigby, was awarded the 2024 Medal of Freedom.

Astronomers still don't know what causes fast radio bursts, but they're starting to use them to illuminate the space between galaxies.

Scientists at the National Astronomical Observatories of the Chinese Academy of Sciences (NAOC) and their international collaborators have recently developed a new method for efficiently extracting information from galaxy surveys. Their research results are published in the journal Communications Physics.