It talks about the galaxies in the universe and milky way galaxy which we are belong

5. GALAXY
System of millions of billions of stars
Large group of stars, gas, dust that constitute
universe
Most of Galaxy have blackhole at the center
GALAXY

9. Globular Clusters
Colletion of millions of ancient star
More densed and spherical shape
Lack of O and B type of star
150 known in Milkyway galaxy

10. Globular Clusters

11. Cepheid Variables
• very large, luminous, yellow stars
• called Cepheids after the first star of this type
to be discovered - Delta Cephei
• Special variable stars :
(a) regular
(b) a uniform function of their brightness

12. Cepheid Variables

13. Milky way Galaxy
• Named after the niboulosity of night sky
• William Hershel (1985)
• 100,000 light years and 1000 light years thick.
• Rotation - 250 km/h

14. Milky way Galaxy

15. The structure of the Milky Way
• Bulge
• Disk
• Halo
• Nucleus
• Dark Matter

18. ELLIPTICAL GALAXY
Smooth and elliptical in appearance
Characteristics:
(a). They must have random star motion
rather than rotational motion.
(b) They have very little gas and dust left
between the stars.
ELLIPTICAL GALAXY

19. ELLIPTICAL GALAXY
They have no star formation occuring and no
hot, bright massive star in there.
No spiralstructure.
ELLIPTICAL GALAXY

20. ELLIPTICAL GALAXY

21. SPIRAL GALAXY
• Flattened disc with spiral disc
The spiral arms can go all the way to bulge or
be attached to the ends of a long bar of gas
and dust.

22. Characteristics:
(a) They have more orderly, rotational motion
than random motion.
(b)They have some or lot of gas and dust
between the stars
(c) They can have new star formation
particularly in spiral arm
(d)Spiral structure
SPIRAL GALAXY

23. SPIRAL GALAXY

24. IRREGULAR GALAXY
No definite shape
It has a lot of gas and dust so star formation is
possible
Small and faint
Example: the small magellanic clouds

25. IRREGULAR GALAXY

27. ANDROMEDA
• also known as M31
• crowded double
nucleus
• 450 globular clusters
• the largest galaxy in the
Local Cluster

28. ANDROMEDA

29. • NGC 4565
• thin disk structure
• 240 globular clusters
• 30 to 50 million light-
years
• constellation Coma
Berenices.
Needle Galaxy

30. • Messier 63 (NGC 5055)
• About the Object
• Name: Messier 63
• Type:Local Universe :
Galaxy : Type : Spiral
• Distance:35 million light
years
Constellation:Canes
Venatici
• Category: Galaxies
Sunflower Galaxy

31. NGC 1365
• barred spiral galaxy located in Fornax
constellation
• approximately 56.2 million light years distant
from the Sun.
• approximately 200,000 light years in diameter
• ROTATION :350 million years

32. NGC 1365

33. Whirlpool Galaxy

34. Whirlpool Galaxy

35. • Messier 104 (M104)
• galaxy's hallmark is a brilliant white, bulbous
core encircled by the thick dust
• ilted nearly edge-on
• 50,000 light-years across and is located 28
million light-years from Earth.
Sombrero Galaxy

36. Sombrero Galaxy

37. • elliptical galaxy
• located around 60 million light-years from
Earth
• They called it “Galactic Serial Killer”
• small globular star clusters.
• brightest source of radio emission in the
constellation
NGC 1316

38. NGC 1316

39. Messier 32
• mall yet bright companion of the Great
Andromeda Galaxy
• elliptical dwarf of only about 3 billion solar
masses
• Smallest Galaxy

40. • a tiny dwarf irregular
galaxy
• 5,000 light years across.
• 4.31 million light years
distant from Earth.
• located within the Local
Group of galaxies.
Sextans A

41. References
• http://www.space.com/29717-globular-
clusters.html
• http://earthsky.org/space/milky-way-rotation
• http://ircamera.as.arizona.edu/NatSci102/Nat
Sci102/lectures/milkywayparts.htm