Astronomers have taken the pulse of red giant stars by measuring their starquakes — stellar shivers that run so deep they can reach a star's core, scientists say.Full story
Artist's impression of the central system of the recurrent nova RS Ophiuchi early in its 2006 outburst. Hydrogen-rich material from the red giant falls onto the surface of its companion white dwarf, leading to a runaway thermonuclear explosion. Ejecta travelling at several thousand kilometers per se
Chi Cygni, a red giant star as shown in this artist's conception, is nearing the end of its life. As it runs out of fuel, it pulses in and out, beating like a giant heart and ejecting shells of material.
Artist's conception of the view of a hypothetical planet around a distant red giant star. Our sun is expected to swell in a few billion years to first fry Earth then engulf it.