The Oort Cloud is the massive spherical cloud that encases our entire Solar System. It is thought to extend from 5,000 AU (an AU is equal to the distance from the Sun to the Earth), out to about 50,000 AU, which is nearly a light year. It's composed of many trillions of objects larger than 1 km across, plus countless more of smaller sizes. The vast majority of comets originate here, slowly drifting through space until they are somehow knocked out of orbit and begin to fall towards the Sun.
Sun King Soup ~ The winter solstice marks the return of the sun, as it begins to make its way back towards the earth. Celebrate this festival of light with a nice rich bowl of Sun King Soup -- the bright sun colors and smooth texture are just the thing for either an appetizer, or a light meal at Yule.
NGC 6888, or the Crescent Nebula, is a cloud of material emitted by a bright star at its center located towards the constellation Cygnus. It possibly began to form around 250,000 years ago. At the center lies WR 136, a massive Wolf-Rayet star that emits an equivalent of the Sun’s mass every 10,000 years. It also is the source of a strong stellar wind, which slams into the previously emitted surrounding material and forms the dense shell shape of the nebula. Image/text: NASA.