Constellations in the sky

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Presentation transcript:

Constellations in the sky

Stars are very big

Stars are far away

Stars are very bright, because they produce light

Objects outside the Earth

The constellations do not exist in 3d

Orion

Orion's important objects

Betelgeuse إبط الجوزاء Ibṭ al-Jauzā’, meaning "the underarm of Orion", or يد الجوزاء Yad al-Jauzā’, meaning "the hand of Orion"

A very big red supergiant

Why is Betelgeuse (600 ly) so big

The Orion nebula

The birth of stars (1300 ly)

Rigel, a massive star (860 ly) Rigel, a massive star (860 ly). Rijl Jauzah al Yusrā, "the left leg (foot) of Jauzah"

Canis major and Sirius

The brightest star in the sky

Sirius, the big neighbor Just 8 light years close, Sirius has 2 times the mass of the Sun and is 25 times more luminous. The surface temperature of Sirius is 10.000 K

Taurus, the bull

Interesting objects in Taurus

Pleiades, a young stars cluster, 440 light years away and 100000 years old

Aldebaran (65 ly) another red giant, the Follower (الدبران)because he seems to follow the Pleiades.

M1, the crab nebula

The remnant if a big explosion The remnant if a big explosion. We saw it happen 400 years ago (6500 ly)

Supernova are very bright

Betelgeuse supernova will look like a second sun