Topic:
Ring Nebula
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Ring Nebula
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n. A planetary nebula in the constellation Lyra.
+This object is a planet-sized white dwarf star, which shines at about 15th magnitude. It is the remainder of a sunlike star, probably once of more mass than our sun, which has blown away its outer envelopes at the end of its Mira-like phas...
The Ring Nebula is classified as a planetary nebula which is a shell of gas and plasma, formed when certain stars die. So, in a way they are clouds of matter in space.
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･ 1 Find the constellation Lyra, the location where the Ring Nebula lies. You can use the Summer Triangle... ･ 2 You should be familiar with it because the Summer Triangle is a useful reference for finding most of... ･ 3 The 3 brightest sta...
http://www.ehow.com/how_5428934_ring-nebula-m.html?ref=...
Actually its neither. It is true that we used to think that this and many other planetary nebula were "limb-brightened bubbles". Now it looks like most planetary nebulae are rings (more like a donut than a cylinder). But even this...
http://answers.yahoo.com/question/index?qid=20080813180...
Tom at the very end of the movie in 2500 as he is floating up towards the star seems to be existing in all three of his lifetimes at once, as he has been taken backwards in time by Izzy, who is then the tree. He is shown to come before the ...
http://www.stainlesssteelrat.net/fountainfaq.htm
Bob is right. It should be easy in a dark sky. Here are a couple of statements from the Observer's Handbook:･ 1) Messier's telescope "had the equivalent light-gathering power of a modern 80-mm to 100-mm reflector."... ･ 2) "T...
http://answers.yahoo.com/question/index?qid=20080121215...
The Southern Ring Nebula is in the constellation Vela, and is visible in the southern hemisphere. The nebula is an expanding cloud of gas surrounding a dying star. This nebula is also known as the "Eight-Burst" Nebula because it...
http://www.enotes.com/astronomy/q-and-a/what-southern-r...
"Most are spherical shells with a finite thickness and more or less hollow. When seen in projection against the sky, such objects always look like circular or elliptical rings." [Odenwald, 1996] Well...this is what astronomers h...
http://www.astronomycafe.net/qadir/q2655.html
A simple way to think of it would be if you lay a doughnut flat on a table and measure the thickness from the outside edge to the hole. Let's say it's 2 inches thick. Then measure the distance across the entire doughnut on the right and lef...
http://wiki.answers.com/Q/Why_would_a_planetary_nebula_...
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