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The nearby red supergiant Betelgeuse, seen as orange blob showing a non-symmetric shape with a bright spot to the upper left

The red supergiant Betelgeuse

image

Légende : The image shows Betelgeuse, a red supergiant in the constellation Orion, observed by the Atacama Large Millimeter/submillimeter Array (ALMA). ALMA consists of many antennae spread across a plain in Northern Chile. The observations from all of these receivers is synthesised together by a central computer to form an image. The wide distances between the antennae mean that is can resolve very fine details. Most stars we observe are just seen as points of light, but Betelgeuse is so large (with a radius about 1,400 times larger than the Sun) and is sufficiently nearby that it is one of the few stars to have been resolved to show it as an extended object. Betelgeuse is a massive star, more than 14 times the mass of the Sun and is relatively young for a star (less than 14 million years old). However, its high mass led to it having a very hot core which burned through its hydrogen fuel quickly. It has since evolved through many stages and now appears as a red supergiant, it's final stage before exploding as a supernova. When such an explosion will happen is not known for certain, but it could be in around 100,000 years. Such an explosion would be visible from Earth, even during the day.
Crédit : ALMA (ESO/NAOJ/NRAO)/E. O’Gorman/P. Kervella
Lien du crédit

Termes du glossaire: Étoile géante , Géante rouge , Supergéante rouge , Étoile supergéante , Étoile de type M
Catégories : Étoiles

Licence : Creative Commons (CC) Attribution 4.0 International (CC BY 4.0) Creative Commons (CC) Attribution 4.0 International (CC BY 4.0) Icônes

Fichier ( image 4.86 MB)


Star Hats

Activités pédagogiques de astroEDU (liens vers le site astroEDU)
Description : Make your star hat, learning about the stars

Termes du glossaire: Étoile
Catégories : Étoiles
Mots clés : Art , Creativity , Hands-on
Tranches d'âge : 4-6
Niveau scolaire : Maternelle
Domaines d'apprentissage : Axé sur les arts , Cours interactif
Coûts : Faible
Durée : 30min
Taille du groupe : Individuel
Compétences : Poser des questions , Communiquer des informations
Auteurs : Tibisay Sankatsing Nava

Licence : Creative Commons (CC) Attribution 4.0 International (CC BY 4.0) Creative Commons (CC) Attribution 4.0 International (CC BY 4.0) Icônes


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