Red giant - Wikipedia
A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses (M ☉)) in a late phase of stellar evolution. The outer atmosphere is inflated and tenuous, making the radius large and the surface temperature around 5,000 K [K] (4,700 °C; 8,500 °F) or lower.
Red giant stars: Facts, definition & the future of the sun
2023年7月29日 · A red giant is a dying star in the final stages of stellar evolution. In about five billion years, our own sun will turn into a red giant, expand and engulf the inner planets —...
What are red giants? Our sun will become one! - EarthSky
2023年11月9日 · Red giants are stars going through their death stages. It has slowly swollen up to many times its original size. Once a star becomes a red giant, it might stay that way for up to a billion...
Red Giant Star | Facts, Information, History & Definition
2020年6月11日 · A red giant star is a luminous giant star of low or intermediate mass in a late phase of stellar evolution. Its outer atmosphere is inflated and tenuous making its radius several times larger than that of our Sun, and the surface temperature is usually around 5,000 K.
Red Giant Star: Journey to the Late Stages of Stellar Life
What are the characteristics of a red giant star? How is a red giant different from a main-sequence star? What happens after the red giant stage of the stellar life cycle?
NASA’s TESS Tunes into an All-sky ‘Symphony’ of Red Giant Stars
2021年8月4日 · This visualization shows the new sample of oscillating red giant stars (colored dots) discovered by NASA’s Transiting Exoplanet Survey Satellite. The colors map to each 24-by-96-degree swath of the sky observed during the mission’s first two years.
What Is A Red Giant Star? - Universe Today
2009年2月5日 · Astronomers call these objects red giant star, and you’ll want to learn more about them, since this is the future fate for the Sun. Don’t panic, we’ve got another 7 billion years or so before the...
The Astrophysics Spectator: Red Giant Stars
Betelgeuse, the bright red star in the Orion constellation, is the most prominent example of a red giant (in fact, a red supergiant) in our sky. This variable star is among the brightest stars in our sky, with an apparent magnitude of around 0.5, but it is also a very distant 470 parsecs from us.
red giant star - Encyclopedia Britannica
…massive enough to become supernovae—namely, red giant stars. That is to say, a red giant has shed its outer envelope in a less-violent event than a supernova explosion and has become an intensely hot star surrounded by a shell of material that is expanding at a speed of tens of…
Red giant - Simple English Wikipedia, the free encyclopedia
A red giant is a giant star that has the mass of about one-half to ten times the mass of our Sun. Red giants get their name because they appear to be colored red and they are very large. Many red giants could fit thousands and thousands of suns like ours inside of them.