Universe A-Z

HALLEY'S COMET

images (1).webp
 
Parallax

is the apparent change in the position of a star that is caused only by the motion of the Earth as it orbits the Sun.
 
X-ray Burster
A strong outburst of X-rays lasting a few seconds appearing to originate from an X-ray source at the edge of the known universe.
 
Back
Top Bottom