Pink: Spectrum of eta UMa acquired in a single capture by Mauve on 9 February 2026 with a 5s integration time. Blue: Hubble Space Telescope STIS spectra of the same star recorded by three grisms.
Have‍‌‍‍‌‍‌‍‍‌ you ever looked at the sky on a clear day and thought about why the sky is blue but space is black? The question looks very simple, but the answer is one of the most interesting stories ...
This composite image features X-ray, ultraviolet, optical, and near-infrared data of the luminous fast blue optical transient (LFBOT) named AT 2024wpp. The transient is the bright spot at the upper ...