Alien conspiracy theorists are foiled by the laws of physics.

THE GIST

Alien watchers called attention to footage captured by a NASA telescope to prove the existence of aliens.

The YouTube video was quickly debunked.
The scientists note that Venus and the triangle, opposite each other across the middle of the camera plane, stay in step as they move.http://beforeitsnews.com/story/1648/749/NL/NASA_Debunks_Mysterious_Triangular_UFO.html

This time, they called attention to peculiar new footage captured by a telescope onboard NASA's STEREO-B spacecraft — one of a pair of probes parked on either side of the sun which, together, provide a 360-degree view of the inner solar system. The footage shows Venus, Earth and, on the opposite side of the field-of-view, a mysterious triangular object headed our way.