A nebula is a cloud of dust and gas in space.New stars are produced from nebulae. Black holes are areas in space,where gravity is so strong that nothing,not even light,can escape from them.Black holes are thought to be formed by collapsed stars. A supernova is an exploding star....
French astronomerCharles Messier(1730–1817) composed a database of objects known at the time as "nebulae," which included 103 objects at its final publication, though additional objects were added based on his personal notes. Many of these objects are often listed with their catalog name, such...
French astronomerCharles Messier(1730–1817) composed a database of objects known at the time as "nebulae," which included 103 objects at its final publication, though additional objects were added based on his personal notes. Many of these objects are often listed with their catalog name, such...
Planetary nebulae are the remains of sunlike stars that have reached the end of their red giant stage. Photo courtesy of NASA Sun-Earth Day 2010 The sun has been shining for about 4.5 billion years [source: NASA]. The size of the sun is a balance between the outward pressure ...
Within these now-active nebulae, particles collide and start to form clumps. As these clumps accumulate more material, they grow in mass. Thanks to their own gravity, they pull in even more gas and dust from the surrounding star-forming region. Over a million years (give or take), these ...
Since the launch of NASA's James Webb Space Telescope (JWST), the agency has made several profound discoveries and put out some of the most stunning images of galaxies and nebulae that exist. In 2024, the telescope again pushed the boundaries of our understanding of the universe by identifying...
In this treatise, he argued that gaseous clouds (nebulae) slowly rotate, gradually collapsing and flattening due to gravity and forming stars and planets.A similar but smaller and more detailed model was proposed by Pierre-Simon Laplace in his treatise Exposition du system du monde (Exposition of...
there was certainly none of that around at theBig Bang– nor for hundreds of thousands of years afterwards. We do in fact have a pretty detailed understanding of how the first atoms formed out of simpler particles once conditions cooled down enough for complex matter to be stable, and how ...
Therefore, these spiral nebulae were indeed other galaxies outside our own. There are still many mysteries surrounding galaxy formation, but on the next page we'll explain some of the best theories about it. Light-years Away Galaxies are far apart. The Andromeda galaxy, which is also ...
When a star explodes, it forms a supernova, a sudden and massive burst of light that can outshine a whole galaxy. Supernovae leave their mark on the skies as nebulae, clouds of solar debris that make for many of the most iconic astronomical images ever captured. Supernovae can give birt...