Greece is planning “a first historic mission” to send a Greek astronaut to the International Space Station, Prime Minister Kyriakos Mitsotakis’ office announced Friday.

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Lurking at the heart of the Milky Way, Sagittarius A* (Sgr A*) is a supermassive black hole four million times the mass of the sun, surrounded by a puzzling collection of young, massive stars whose orbits have long defied explanation. Astronomers have proposed various competing theories to account for these stars, but none has been […]

The NASA Artemis program, now supported by 67 countries under the Artemis Accords, plans to return humans to the moon by 2028. A recent White House Executive Order has gone further, directing NASA to establish a permanent lunar outpost by 2030.

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Researchers from the University of Oxford have uncovered evidence that Mars once hosted enormous, Earth-like magmatic systems deep beneath its surface—despite the planet lacking the plate tectonics long thought necessary for this kind of geological complexity.

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The Gaia mission has allowed researchers to understand the motions of stars like never before, even revealing possible interactions between our solar system and nearby stars. Planetary Science Institute Senior Scientist Nathan Kaib and collaborator Sean Raymond (Universite de Bordeaux) have found that a recent stellar passage likely triggered a huge increase in comet formation […]

The European-Chinese Smile mission reached its designated science orbit on June 20, 2026. The team is now embarking on a two-month campaign to commission the spacecraft, which involves switching on and testing its toolbox of science instruments.

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Black holes are some of the most mysterious objects in the universe, but they aren’t always silent. When two black holes are close enough to each other, they spiral toward one another, eventually crashing in an enormous explosion and forming a single, larger black hole.

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