When it comes to the expansion rate of the universe, physicists have apparently agreed to disagree. Two types of measurements clash over how fast the cosmos is expanding (SN: 7/30/19).…
Category: Space
This is the most comprehensive X-ray map of the sky ever made
A new map of the entire sky, as seen in X-rays, looks deeper into space than any other of its kind. The map, released June 19, is based on data…
Half the universe’s ordinary matter was missing — and may have been found
At long last, all of the universe’s ordinary matter seems to be present and accounted for. Astronomers have taken a new census of matter in the universe by examining how…
Ingenuity is still flying on Mars. Here’s what the helicopter is up to
The Ingenuity Mars helicopter was never supposed to last this long. NASA engineers built and tested the first self-powered aircraft to fly on another planet to answer a simple question:…
A space rock called Kamoʻoalewa may be a piece of the moon
The moon’s violent history is written across its face. Over billions of years, space rocks have punched craters into its surface, flinging out debris. Now, for the first time, astronomers…
Pluto’s dark side reveals clues to its atmosphere and frost cycles
Pluto’s dark side has come into dim view, thanks to the light of the dwarf planet’s moon. When NASA’s New Horizons spacecraft flew past Pluto in 2015, almost all the…
What the Perseverance rover’s quiet landing reveals about meteor strikes on Mars
The lander was listening. On February 18, NASA’s InSight lander on Mars turned its attention to the landing site for another mission, Perseverance, hoping to detect its arrival on the…
An X-ray glow suggests black holes or neutron stars fuel weird cosmic ‘cows’
A brilliant blast from a galaxy 2 billion light-years away is the brightest cosmic “Cow” found yet. It’s the fifth known object in this new class of exploding stars and…
An early outburst portends a star’s imminent death
A star’s death usually comes without warning. But an early sign of one star’s imminent demise hints at what happens before some stellar explosions. In a last hurrah before exploding,…
Astronomers identified a second possible exomoon
Some of the same researchers who found the first purported exomoon now say that they’ve found another. Dubbed Kepler 1708 b i, the satellite has a radius about 2.6 times…
