Tag: Alex Lobel

Science & Tech
Raging storms of hot and cold gas

New observations with the Space Telescope Imaging Spectrograph (STIS), Hubble’s high-precision and ultra-sensitive spectrometer, show that the warm chromosphere of Betelgeuse extends out to more than 50 times its radius…

January 6, 2004
Science & Tech
Betelgeuse’s chromosphere beats like a human heart

For many years astronomers have known that the atmospheres of pulsating stars either expand or contract over time, but they have long puzzled over the question: “What physical mechanism drives…

January 13, 2000