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Jupiter: Galilean Moons
horbrastar
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Jupiter, Including Io and Europa
horbrastar
1 views
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Saturn's Rings
horbrastar
1 views
Brief summary of the rings of Saturn
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size and angle FINGERNAIL PROBLEM.mp4
horbrastar
25 views
Work a sample problem showing the relation between the size of an object, its distance and the angle that it subtends.
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Size and angle DERIVE THE LAW
horbrastar
29 views
Why is this expression true: Theta = 57.3 S/d ?
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Spectal Classification
horbrastar
25 views
How do astronomers classify the spectrum produced by a star?
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exoplanets II -- 51 Peg
horbrastar
33 views
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exoplanets I -- radial velocity
horbrastar
38 views
Brief Kahn-type tutorial on how astronomers discover exoplanets
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magnitude PROBLEM dist to El Nath.mp4
horbrastar
85 views
Solve a magnitude problem: what is the distance to El Nath?
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parallax
horbrastar
483 views
How do astronomers measure distance to nearby stars using parallax?
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