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Sky Tonight—Feb 28, Moon and Venus closest together on morning of March 1
Posted By Editor On February 27, 2011 @ 10:37 pm In Earth & Sky | Comments Disabled
Courtesy of EarthSky
A Clear Voice for Science
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 Our sky chart shows the waning crescent moon  and the brightest planet Venus for about an hour before sunrise on March 1.
We are showing mid-northern latitudes, like those in the U.S. As seen from the world’s eastern hemisphere – Europe, Africa, the Middle East, western Asia, Indonesia, Australia and New Zealand – the moon and Venus pair up even more closely together than they do in the Americas.
In the Middle East and western Asia in particular, the moon and Venus come within a hairsbreadth of touching one another on the sky’s dome. However, from everywhere worldwide, the glorious morning couple graces the dawn and predawn sky.
Yesterday, we learned that the moon’s rotational axis and Venus’ rotational axis both align almost perpendicularly to the ecliptic – the plane of the Earth’s orbit around the sun. In contrast, the Earth’s rotational axis is titled about 23.5 degrees out of vertical with the ecliptic.
The moon’s northern axis tilts about 1.5 degrees out of perpendicular to the ecliptic, whereas Venus’ southern axis tilts less than 3 degrees from straight up-and-down. A planet’s or any moon’s northern axis belongs to the hemisphere that rotates counter-clockwise, and the southern axis belongs to the hemisphere that rotates clockwise. Depending on your perspective, the moon stands on its head while Venus stands on its head – or vice versa.
Whatever your perspective, be sure to watch nighttime’s two most brilliant celestial bodies – the moon and Venus – lighting up the dawn and predawn hours on Tuesday, March 1.
By Bruce McClure 
EarthSky: Space 
Universe Today 
StarDate Online 
Sky and Telescope 
National Geographic 
Space Com 
Simostronomy Blog 
Amazing Space 
Scope City 
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URLs in this post:
 www.EarthSky.org: http://www.EarthSky.org
 Image: http://www.berthoudrecorder.com/wp-content/uploads/2011/02/phase281.gif
 Image: http://www.berthoudrecorder.com/wp-content/uploads/2011/02/feb281.jpg
 waning crescent moon: http://earthsky.org/moon-phases/waning-crescent
 Bruce McClure: http://earthsky.org/team/brucemcclure/
 Astronomy Picture of the Day from NASA/JPL: http://antwrp.gsfc.nasa.gov/apod/
 EarthSky: Space: http://earthsky.org/space
 CHANDRA Photo Album: http://chandra.harvard.edu/photo/
 U.S. Naval Observator Astronomical Information cente: http://www.usno.navy.mil/USNO/astronomical-applications/astronomical-information-center/astronomical-information-center
 Universe Today: http://www.universetoday.com/
 StarDate Online: http://stardate.org/
 Sky and Telescope: http://www.skyandtelescope.com/observing/ataglance/
 National Geographic: http://news.nationalgeographic.com/news/
 Space Com: http://www.space.com/nightsky/
 Simostronomy Blog: http://simostronomy.blogspot.com/
 Amazing Space: http://amazing-space.stsci.edu/tonights_sky/
 The York County Astronomical Society: http://www.ycas.org/tonights_sky.htm
 Scope City: http://www.scopecity.net/
 James S McDonnell Planetarium: http://www.slsc.org/WhatToDo/Planetarium/NightSkyUpdate.aspx
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