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The Sun
Our Very Own Star
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http://www.esa.int/esaSC/SEM4SB4XQEF_index_1.html
Assembled By
Ken Mitchell
Livermore TOPScience
Star Forming Region NGC 3582
Accretion Disk
A rotating disk of gas
and dust matter that may
form around any of a
variety of stars or other
massive objects.
In the case of young
stars, accretion disks
contain unconsolidated
material, such as cosmic
dust grains, which may
subsequently accrete to
form planets and other
sizable objects
The Beginning – A Protostar
A star's life is a constant battle against gravity, the force that wants
to compress it, and pressure support which is trying to hold it up.
That battle begins as soon as a molecular cloud begins to collapse
into a protostar.
SOHO Best Sun Photo
HR Diagram - Star Sequence
Cutaway of Our Only Thermonuclear Power Plant
Sun Physics
Basic Fusion Reactions in the Sun
Paste the URL into your browser before starting:
http://www.astro.ubc.ca/~scharein/a311/Sim/fusion/Fusion.html
Terrestrial Planets – Close to the Sun
Mercury
Venus
Earth
Mars
Mercury
Venus against a starry background
Welcome to Planet Earth
Mars in Opposition,
2001
Outer Planets – The Gas Giants
Jupiter
Saturn
Uranus
Neptune
Hubble spots
rare triple
eclipse on
Jupiter
Saturn – from Cassini
Uranus – two views
Spring time on Neptune
Dwarf Planet Pluto and its satellite Charon
Planet Summary Sheet
Distanc
e
(AU)
Radius
(RTE)
Mass
(RTE)
Orbital
Period
Rotation
(RTE)
Axial
Tilt
# of
Satellite
s
Orbital
Inclinatio
n
Density
(g/cm3)
Sun
0
109
332,800
---
25 – 36*
---
9
---
1.410
Mercur
y
0.39
0.38
0.05
88d
58.8
0.1O
0
7O
5.43
Venus
0.72
0.95
0.89
224.7d
244
177.4O
0
3.394O
5.25
Earth
1.0
1.00
1.00
365.2d
1.00
23.45O
1
0.000
5.52
Mars
1.5
0.53
0.11
687d
1.88y
1.029
25.19O
2
1.850O
3.95
Jupiter
5.2
11
318
11.8y
0.411
3.12O
63
1.308O
1.33
Saturn
9.5
9
95
29.2y
0.428
26.73O
59
2.488O
0.69
Uranus
19.2
4
17
83.75y
0.748
97.86O
27
0.774O
1.29
Neptun
e
30.1
4
17
163.7y
0.802
29.56O
13
1.774O
1.64
Pluto**
39.5
0.18
0.002
248y
0.267
119.6O
1-3
17.15O
2.03
KAM: 3/29/08
O
Our Sun’s Life Cycle
THE END
Cometh