THE NIGHT SKY

THE NIGHT SKY

1. ORION CELESTIAL HUNTER

   • greek legend
     • was the mortal son of god Peseidon
   • visible in the northern hemisphere
     • 3 stars forming a diagonal line
       • know as THE BELT OF ORION
         • • Mintaka • Alnilam • Alnitak
           • Arabic names

2. APPARENT MAGNITUDE

   • numerical scale that denote how bright a celestial object looks from Earth
     • -negative numbers-
       • brightest objects in the sky

3. DARK AGE

   • Middel East
     • Center for Astronomical learning
       • Arabic Culture
         • keep alive
           • the body of celestial knowledge

4. BETELGESE

   • 10th brightest star visible
     • "RED GIANT"

5. STELLAR MASS BLACK HOLE

   • Gravitational collapse of massive stars

6. STARS

   • Interstellar clouds of gas and dust composed og cold
     • ORION NEBULA M42
       • cloud of gas

7. COLORS OF THE STARS

   • •hottest stars: bluer color
   • •cooler stars: yellow to red and orange color