STEVE is smearing green ‘streaks’ across the sky, and nobody knows why | Live Science

The green streaks only last for 30 seconds, then vanish. What are they? The mysterious, aurora-like phenomenon called STEVE just got a little weirder. If you don’t know STEVE (short for Strong Thermal Emission Velocity Enhancement) by name, you may know it from photos. Unlike the infamous Southern and Northern Lights, which blanket the sky […]

Read More STEVE is smearing green ‘streaks’ across the sky, and nobody knows why | Live Science

Rosetta spacecraft detects unexpected ultraviolet aurora at a comet

Data from Southwest Research Institute-led instruments aboard ESA’s Rosetta spacecraft have helped reveal auroral emissions in the far ultraviolet around a comet for the first time. At Earth, auroras are formed when charged particles from the Sun follow our planet’s magnetic field lines to the north and south poles. There, solar particles strike atoms and molecules in […]

Read More Rosetta spacecraft detects unexpected ultraviolet aurora at a comet