Stars-How They Are Formed Do you want to know how stars are born? Well here goes. The birth of a star begins when massive clouds of dust and gas start to collapse and break down. How does this happen? It happens through the force of gravity.Gravity bounds the elements together to crea...
too. Three glowing red charcoal briquettes put out more energy than one glowing red charcoal briquette at the same temperature. Likewise, if two stars are the same temperature but different sizes, then the
Such structures include multiple-ring systems, hourglass-shaped nebulae, and butterfly-type morphologies, and they are found around quietly dying Sun-like stars as well as around massive stars that explode as supernovae (see the figure). The formation mechanism of these structures is connected to...
A nebula ais one of the most beautiful deep-sky objects in the night sky. But what is a nebula? And how do these space clouds form?
How many stars are there in the universe?(不需要准确数字)Where do they come from and where do they go to?What is the most common chemical element in the universe?How are all the other chemical elements formed?Define the terms:Galaxy,nebula,black hole,supernova,comet,asteroid,meteorite(这题...
“Stars are the machines that sculpt the universe. We would not have life without stars, and yet we don’t fully understand how they form,” explained study leader Elena Sabbi of the Space Telescope Science Institute in Baltimore in astatement. “We have several models that make predictions,...
A few hundred of these are scattered above and below the disk. The stars here are much older than those in the galactic disk. Halo A halo is a large, dim, region that surrounds the entire galaxy. It's made of hot gas and possibly dark matter. Gravity All of these compone...
a reflection nebula in the constellation Perseus some 960 light-years away that has a number of star clusters inside of it. These rogue planets originated in a process that usually forms stars, and have some of the lowest known masses for objects that formed this way. They add to a growing...
What are elliptical galaxies made of? Where are newly formed stars found in a spiral galaxy? How old is the oldest meteorite? How old is Arcturus? How many light years away is the Andromeda Galaxy? How old is the Kuiper belt? What do irregular galaxies look like?
The birth of a star occurs to the gravitational effects on nebulae. The dust and gas in a nebula begin to clump together in spots of larger gravitational pull. As more and more gas and dust gather, protostars are formed, and as these protostars reach a high enough tem...