On the Earth-facing side of the Sun, the largest sunspot complex of 2025 has formed, and it may be accumulating energy for a ...

Earth may have a moon today because a nearby neighbor once crashed into us, a new analysis of Apollo samples and terrestrial ...

What can star variability—changes in a star's brightness over time—teach astronomers about exoplanet habitability? This is ...

Researchers refined the trajectory of interstellar comet 3I/ATLAS using ExoMars Trace Gas Orbiter data, improving predictions and enabling precise monitoring for scientific study and planetary defense ...

Biggest vs smallest - how do we measure up in the grand scheme of the universe? Explore the fascinating scales of existence, from quantum particles to the observable universe’s edge. A journey into ...

The Hubble Space Telescope has been surveying space since 1990 and has captured some interesting cosmic elements in action.

According to the leading theory of how the Earth-Moon system formed (the Giant Impact Hypothesis), a Mars-sized object (named ...

The surface of Earth is finite. We can measure it. If it was expanding, then its size would grow with time. And once again, good ol' Earth helps us understand what the universe might be doing beyond ...

The observation of the low-energy γ-ray (0.1 to 30 MeV) sky has been significantly limited since the Imaging Compton ...

A century ago, one dim, flickering star in the Andromeda galaxy forced astronomy to face a larger universe. That star, cataloged as V1, sits roughly 2.2 million light years away, about 13 quintillion ...