Rapidly spinning dead stars in the dwarf galaxy Sagittarius are the source of gamma-ray emissions within the massive bubbles that blow out from our galaxy.
Earth’s highest, coldest, rarest clouds are back. How to see the eerie ‘noctilucent clouds’ this summer.
Look North as the stars appear in June and July to have a chance of seeing rare noctilucent (or ‘night-shining’) clouds with the naked eye.