... Seeing Through Galaxies . ... The large elliptical galaxy NGC 5090 lies just beyond it - both are about 100 million light years distant in the southern constellation Centaurus. ... Runaway Star . ... On the far side of our Galaxy, gas clouds explode away from a small black hole. ... Some of the stars that form the constellation of Orion are part of a giant gas cloud complex that stretches over 100 light years and appears more than 50 times the diameter of the Moon. ... Jupiter's Inner Moons . ...