A nova is a sudden, short-lived explosion from a compact star not much larger than Earth. The outburst comes from a collapsed star known as a white dwarf, which circles so close to a normal star that a stream of gas flows between them. This gas piles up into a layer on the white dwarf's surface until it reaches a flash point and detonates in a runaway thermonuclear explosion. Astronomers estimate that between 20 and 50 novae occur each year in our galaxy, but despite their power most go undis...| NASA Scientific Visualization Studio
A “new star” could explode at any moment in 2024! How can we see it? Learn all about the show-stopping star T Coronae Borealis in our article.| Star Walk
This site is intended for students age 14 and up, and for anyone interested in learning about our universe.| imagine.gsfc.nasa.gov
The constellation Boötes the Herdsman is an excellent target for June nights. Arcturus is the brightest star in the constellation. Chart via EarthSky.Boötes the Herdsman is a Northern Hemisphere constellation best seen in the late spring or early summer. It’s one of the largest constellations in the sky, ranking 13th out of 88. Boötes is most famous for its bright star Arcturus, which is the 4th brightest star in the night sky.| EarthSky
The star Arcturus is easy to identify. Use the Big Dipper to follow the arc to Arcturus and then speed on to Spica.Help! EarthSky needs your support to continue. Our yearly crowd-funding campaign is going on now. Donate here.| EarthSky
AAVSO webinar| www.aavso.org
Types of Stars The universe’s stars range in brightness, size, color, and behavior. Some types change into others very quickly, while others stay relatively unchanged over trillions of years. Main Sequence Stars A normal star forms from a clump of dust and gas in a stellar nursery. Over hundreds of thousands of years, the clump […]| science.nasa.gov
This image of the Crab Nebula is a composite of 5 images taken using 5 telescopes, spanning wavelengths from radio to X-ray. Colors represent wavelengths as follows: VLA (radio) in red; Spitzer Space Telescope (infrared) in yellow; Hubble Space Telescope (visible) in green; XMM-Newton (ultraviolet) in blue; and Chandra X-ray Observatory (X-ray) in purple. Image via JPL.A supernova explodes| EarthSky
This site is intended for students age 14 and up, and for anyone interested in learning about our universe.| imagine.gsfc.nasa.gov
