WASHINGTON — Roscosmos has replaced a cosmonaut assigned to the next Crew Dragon mission to the International Space Station for reasons neither it nor NASA will disclose. Roscosmos announced Dec.
WASHINGTON — Roscosmos has replaced a cosmonaut assigned to the next Crew Dragon mission to the International Space Station for reasons neither it nor NASA will disclose. Roscosmos announced Dec.
Sgr A* marks the supermassive black hole at the center of our Milky Way galaxy. The green outlines are locations of star clusters. S2 is one such star cluster. Meanwhile,
China’s lunar ambitions grab attention, but a quieter milestone that the country achieved earlier this year could have longer-term implications for how nations operate in orbit. In mid-2025, China pulled
View at EarthSky Community Photos. | Steven Bellavia captured Mercury’s sodium tail on the morning of December 3, 2025, from Surry, Virginia. Steven wrote: “A 24-million-km-long plume of gas is
Get ready stargazers, the final full moon of 2025 rises tonight! Here’s what to expect when the “Cold Supermoon” looms large over the eastern horizon at sunset on Dec. 4.
NASA’s Nancy Grace Roman Space Telescope is now fully assembled! The space telescope is currently at the Goddard Space Flight Center in Greenbelt, Maryland. It will now undergo testing before
In November 2025, the European Space Agency’s Jupiter Icy Moons Explorer (Juice) conducted a series of observations of the comet 3I/ATLAS using five of its scientific instruments. This mission aimed
“Why are we here?” is humanity’s most fundamental and persistent question. Tracing the origins of the elements is a direct attempt to answer this at its deepest level. We know
What can an exoplanet leaking helium teach astronomers about the formation and evolution of exoplanet atmospheres? This is what a recent study published in Nature Astronomy hopes to address as
An international team led by the University of Oxford has identified one of the largest rotating structures ever reported: a “razor-thin” string of galaxies embedded in a giant spinning cosmic




