1
00:00:06,140 --> 00:00:04,309
what's up for June hello and welcome I'm

2
00:00:07,490 --> 00:00:06,150
Jane Houston Jones at NASA's Jet

3
00:00:11,209 --> 00:00:07,500
Propulsion Laboratory in Pasadena

4
00:00:13,640 --> 00:00:11,219
California 2009 is international year of

5
00:00:16,970 --> 00:00:13,650
astronomy and each month this year were

6
00:00:19,250 --> 00:00:16,980
showcasing a great celestial object this

7
00:00:23,029 --> 00:00:19,260
month it's the Hercules globular cluster

8
00:00:25,460 --> 00:00:23,039
which is also called m13 it's called m13

9
00:00:28,310 --> 00:00:25,470
because this object is the 13th of

10
00:00:31,310 --> 00:00:28,320
charles Messier's 1764 catalogue of

11
00:00:33,639 --> 00:00:31,320
celestial objects but Charles Messier

12
00:00:36,080 --> 00:00:33,649
wasn't the discoverer of this cluster

13
00:00:39,380 --> 00:00:36,090
m13 was discovered half a century

14
00:00:41,600 --> 00:00:39,390
earlier by Edmond Halley a globular

15
00:00:43,639 --> 00:00:41,610
cluster is a collection of hundreds of

16
00:00:47,090 --> 00:00:43,649
thousands of ancient stars held together

17
00:00:48,979 --> 00:00:47,100
by gravity you can easily find em 13 in

18
00:00:51,049 --> 00:00:48,989
the keystone of the constellation

19
00:00:53,600 --> 00:00:51,059
hercules about a third of the way along

20
00:00:57,650 --> 00:00:53,610
a line drawn between ada and zeta

21
00:00:59,990 --> 00:00:57,660
herculis m13 will look like a round hazy

22
00:01:02,479 --> 00:01:00,000
glow and binoculars through a telescope

23
00:01:04,880 --> 00:01:02,489
you'll see individual stars at the edge

24
00:01:08,030 --> 00:01:04,890
of the cluster and a dense core of stars

25
00:01:10,039 --> 00:01:08,040
closer to the center the hub of space

26
00:01:12,560 --> 00:01:10,049
telescope's wide field and planetary

27
00:01:15,380 --> 00:01:12,570
camera 2 or whiff pic 2 for short and

28
00:01:19,219 --> 00:01:15,390
the advanced camera for surveys combined

29
00:01:21,710 --> 00:01:19,229
data from 1999 through 2006 to create a

30
00:01:23,140 --> 00:01:21,720
glittering image of this Herculean Star

31
00:01:25,780 --> 00:01:23,150
City

32
00:01:28,240 --> 00:01:25,790
a spiral galaxy like our Milky Way is

33
00:01:31,840 --> 00:01:28,250
made up of three visible parts the

34
00:01:34,240 --> 00:01:31,850
nucleus the disk and the halo the

35
00:01:37,330 --> 00:01:34,250
nucleus contains the highest density of

36
00:01:40,540 --> 00:01:37,340
stars in the galaxy most of the gas and

37
00:01:43,030 --> 00:01:40,550
dust is contained in the disk the halo

38
00:01:46,870 --> 00:01:43,040
or outer shell is spherical and contains

39
00:01:49,000 --> 00:01:46,880
little gas dust or star formation the

40
00:01:52,930 --> 00:01:49,010
globular clusters found in the halo are

41
00:01:56,350 --> 00:01:52,940
the oldest parts of the galaxy m13 is

42
00:02:00,670 --> 00:01:56,360
one of 150 globular clusters in the halo

43
00:02:02,530 --> 00:02:00,680
of our Milky Way galaxy this is the last

44
00:02:05,469 --> 00:02:02,540
month to get a good look at Saturn in

45
00:02:07,300 --> 00:02:05,479
the evening sky so don't miss it the

46
00:02:09,430 --> 00:02:07,310
Rings are narrowing to nearly edge-on

47
00:02:12,520 --> 00:02:09,440
and look dimmer than they did last month

48
00:02:14,650 --> 00:02:12,530
you can read about the Hercules globular

49
00:02:18,430 --> 00:02:14,660
cluster on NASA's international year of

50
00:02:21,820 --> 00:02:18,440
astronomy website astronomy 2009 nasa

51
00:02:26,680 --> 00:02:21,830
gov and you can learn all about NASA's