... This Hubble Space Telescope picture shows Hen-1357, the youngest known planetary nebula. ... Satellites in low Earth orbit reflect sunlight and are often visible gliding across early evening and predawn skies. ... On the Moon, the long history of micrometeorite bombardment has blasted away at the rocky surface creating a layer of powdery lunar soil or regolith. ... Galaxies Away . ... Planetary Nebula NGC 7027 in Infrared . ... Even so, NGC 7027 is 14,000 times larger than the Earth-Sun distance. ...