Credit & Copyright: Saeid Parchini
Explanation:
What divides the north from the south?
It all has to do with the spin of
the Earth.
On Earth's surface,
the equator is the dividing line, but on Earth's sky, the dividing line is the
Celestial Equator -- the equator's projection onto the sky.b
You likely can't see the
Earth's equator around you, but anyone with a
clear night sky can find the
Celestial Equator by watching stars move.b
Just locate the dividing line between
stars that arc
north and stars that arc south.
Were you on Earth's equator, the Celestial Equator would go straight up and down.b
In general, the angle between the Celestial Equator and the vertical is your
latitude.b
The featured image combines 325 photos taken every 30 seconds over 162 minutes.
Taken soon after sunset earlier this month,
moonlight
illuminates a snowy and desolate scene in northwest
Iran.
The bright streak behind the
lone tree is the planet
Venus setting.
Almost Hyperspace:
Random APOD Generator
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Yanvar' Fevral' Mart Aprel' Mai Iyun' Iyul' Avgust Sentyabr' Oktyabr' Noyabr' Dekabr' |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
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star trail - sledy zvezd
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