Hubble Calculates the Size of Interstellar Comet 3I/ATLAS
Hubble’s observations are allowing astronomers to more accurately estimate the size of the comet’s solid icy nucleus. The upper limit on the diameter of the nucleus is 5.6 kilometers, though it could be as small as 320 metres across, researchers report. Though the Hubble images put tighter constraints on the nucleus size compared to previous […]
Interstellar Object Comet 3I/ATLAS Detected
Using the Gemini North telescope in Hawai‘i, a team of astronomers led by Karen Meech (Institute for Astronomy/University of Hawai‘i) has captured an image of comet 3I/ATLAS, an interstellar object that was first detected on 1 July 2025 by ATLAS (Asteroid Terrestrial-impact Last Alert System). Gemini North is one half of the International Gemini Observatory, […]