* Astronomy

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RE: September 2009

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The moon is near to Jupiter tonight.

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Planetary Kp-index plot

Credit NOAA

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By the end of the month, Orion the mighty hunter will start peeking over the horizon by 8 p.m. and will have completely cleared the horizon by 9 p.m. Move those times back two hours for the beginning of October. Each individual star rises four minutes earlier each day. Thirty times four equals 120 minutes, so over the course of each month, the sky moves forward two hours.
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Autumn has arrived, at least as of 3:19 p.m. MDT Tuesday when the sun crossed the celestial equator moving south. Although the weather has been predicting such an event for a couple of weeks.
Speaking of Autumn, the autumnal constellations are making a good showing above the eastern horizon these early to mid-evening hours, pushing the stars of summer off stage right.
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On this day, in 1846, French astronomer Urbain Jean Joseph Le Verrier and British astronomer John Couch Adams discovered the planet Neptune. The discovery was verified by German astronomer Johann Gottfried Galle.

Neptune was the first planet found by mathematical prediction rather than by empirical observation. Unexpected changes in the orbit of Uranus led astronomers to deduce that its orbit was subject to gravitational perturbation by an unknown planet. Neptune was subsequently found within a degree of its predicted position.
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What's Up for September? Jupiter

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Amateur Astronomy Sky this Week 2009-09-26

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Asteroid to be Visible Through Binoculars
According to NASA the asteroid Juno will be visible through binoculars in coming days. With a diameter of 145 miles Juno is the 10th biggest asteroid known to astronomers. The asteroid is 112 million miles away so there is no risk of a collision.

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Uranus

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Planet Uranus
Magnitude:              5.7
Diameter:                  3.6"
Illuminated Fraction: 1.000
Phase:                       0°
Earth Distance:         19.0930 AU
Solar Distance:          20.0980 AU
Rise:                  1:19
Culmination :             1:05
Set:                          6:51

Position(2000): 2000 RA 23h41m06.80s,    Dec -02°54'51.9"