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To detect ancient whispers from the cosmic Dark Ages – the years after the Big Bang – we need a radio telescope in a quiet place. On Earth, our electronics...
Exoplanets with masses similar to Earth are common in our galaxy. These planets are especially common around low-mass stars such as red dwarfs, researchers...
How to find the Northern Cross The Northern Cross is a clipped version of the constellation Cygnus the Swan. It’s an asterism, or pattern of stars that...
The American Geophysical Union published this story originally on July 8, 2025. Edits by EarthSky. Two surges in human dam-building Over the past two...
Airport radars around the world leak electromagnetic energy into space. That energy is strong enough that alien civilizations could detect it from 2...
Earth could be located inside a nearly 2-billion-light-year-wide void, astronomers say. This could explain the Hubble tension, or disagreements in measurements...
The New Horizons spacecraft, which has left the solar system, beamed back images that have led to the first test of deep-space navigation. That is, New...
Scientists found high-velocity gas clouds in the galaxy Messier 83 that likely came from outside the galaxy. These clouds consist of dense molecular...
The colorful world of Rho Ophiuchi The Rho Ophiuchi cloud complex is one of the most colorful areas of the night sky. Therefore, it’s a favorite target...
With a little imagination, you can see the stars of Scorpius tracing the shape of a scorpion. The bright red star Antares marks the Scorpion’s Heart....
Yes, Lyra is a small constellation, 52nd out of the 88 constellations. But it has a big presence. That’s because its bright star Vega is prominent in...
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