
While it's over that way...
... maybe they could take a few quick snaps of that other Earth.
NASA's venerable Stardust spacecraft will on Valentine's Day burn its remaining fuel to approch and photograph comet Tempel 1, marking the end of a 12-year, 3.7 billion-mile odyssey. At 16:37 GMT, Stardust will pass within 124 miles of the comet, grabbing 72 "high-resolution images during the encounter", while attempting to " …
It's the opposite side but not exactly or in line with the sun (yet). It is approximately in line with Mercury at the the moment as viewed from Earth.
This page ...
http://stardust.jpl.nasa.gov/mission/scnow.html
and especially this diagram ...
http://www2.jpl.nasa.gov/stardust/mission/sc1.jpg
shows the relationship quite well.
I assume it will actually go behind the sun later on.