25 October 2014 - Mission Day: 6903 - DOY: 298
Hotshot
 
 

Mercury Transit 08 November 2006


Mercury's path across the solar disk as seen from SOHO


Mercury's path across the solar disk as seen from SOHO
Click on the image for a larger version




MDI MPEG movie of the transit MPEG movie of the transit / small MPEG / Quicktime / DivX
EIT 195 MPEG movie of the transit EIT 195: MPEG / Quicktime movie
EIT 304 MPEG movie of the transit EIT 304: MPEG movie
EIT 171 MPEG movie of the transit EIT 171: MPEG movie
EIT 284 MPEG movie of the transit EIT 284: MPEG movie
  Hinode/SOT GBand: Javascript, GIF animation and MPEG movie


Print media: High-resolution TIFF illustration of Mercury's path as seen from earth.


A transit of Mercury is a very small solar eclipse. Its appearance is very different from a total eclipse, though, because the disk of Mercury is about 200 times smaller than the diameter of the sun as seen from the earth. Instead, one could see a small black disk cross the face of the sun during a five-hour journey. A transit occurs whenever a planet moves between the the earth and the sun. At that time we see a small black disk crawl across the face of our star. Obviously, only the planets Mercury and Venus can do this because those are the only planets with orbits smaller than the earth's, and hence the only planets that can get between us and the sun.

Depending on where you reside on our home planet, you may or may not have been able to see the Mercury transit. SOHO, in any case, has been able to observe the transit in its entirety since it is conveniently orbiting the Lagrangian point L1 between sun and earth.

Note that you need to rotate SOHO images by approx. 23 degrees (the so-called "P angle") counter-clockwise before superposing them with images of the Mercury transit taken from earth. This plot shows Mercury's path as seen from SOHO.


Related Links

SOHO Links Miscellaneous Links
 
 

• European Site • US Site

 

Feedback & Comments: SOHO Webmaster

Last modification: 13 Dec 2006

SOHO
and
SOHO
SOHO is a project of international cooperation between