Thursday, January 03, 2013 10:54:17 PM
It's All Uphill From Here: The Earth at Perihelion
NASA's SDO satellite image of the Sun taken within minutes of perihelion, at 04:46 UTC on Jan. 2, 2013.
Drawings of a circle and an ellipse representing Earth's orbit. Can you tell which is which?
As seen from above, a large planet orbits a star–or rather the star and planet orbit their shared center of mass, or barycenter.
( http://spaceplace.nasa.gov/barycenter/ )
As seen from the side, a large planet and star orbit their shared center of mass, or barycenter, with the star seeming to shift back and forth.
( http://spaceplace.nasa.gov/barycenter/ )
The size of the Sun at aphelion and perihelion.
( http://www.perseus.gr/Astro-Solar-Scenes-Aph-Perihelion.htm )
Jan. 2, 2013
http://www.slate.com/blogs/bad_astronomy/2013/01/02/perihelion_earth_is_closest_to_the_sun_today.html [with comments]
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(linked in) http://investorshub.advfn.com/boards/read_msg.aspx?message_id=83002601 and preceding (and any future following)
NASA's SDO satellite image of the Sun taken within minutes of perihelion, at 04:46 UTC on Jan. 2, 2013.
Drawings of a circle and an ellipse representing Earth's orbit. Can you tell which is which?
As seen from above, a large planet orbits a star–or rather the star and planet orbit their shared center of mass, or barycenter.
( http://spaceplace.nasa.gov/barycenter/ )
As seen from the side, a large planet and star orbit their shared center of mass, or barycenter, with the star seeming to shift back and forth.
( http://spaceplace.nasa.gov/barycenter/ )
The size of the Sun at aphelion and perihelion.
( http://www.perseus.gr/Astro-Solar-Scenes-Aph-Perihelion.htm )
Jan. 2, 2013
http://www.slate.com/blogs/bad_astronomy/2013/01/02/perihelion_earth_is_closest_to_the_sun_today.html [with comments]
---
(linked in) http://investorshub.advfn.com/boards/read_msg.aspx?message_id=83002601 and preceding (and any future following)
Greensburg, KS - 5/4/07
"Eternal vigilance is the price of Liberty."
from John Philpot Curran, Speech
upon the Right of Election, 1790
F6
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