Nebulae around evolved stars: how intricate nebula structures form has been a mystery, but a model based on a 20-year-old supernova explosion now suggests answers.(ASTRONOMY)Despite many observations of impressive nebular structures around evolved stars, there is no acceptable theory that explains ...
But as Hubble began making observations with the Hooker Telescope, he noticed that objects known as "nebulae," thought to be components of the Milky Way, were located far beyond its boundaries. At the same time, he observed that these "nebulae" were moving rapidly away from the Milky Way. ...
Electron energy transitions and ionization are the processes by which so-calledemission nebulaein space glow. Emission nebulae are oftenstar-forming regions, and are being ionized by the hard ultraviolet light from the young, massive starsborn within them. Radioactive decay Not all atoms are stable...
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 ...
When our sun becomes a red giant, its radius will be about 100 times what it is now. 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 ...
“material” – physical matter – first came about. If we are aiming to explain the origins of stable matter made of atoms or molecules, 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 ...
The following image was taken at a mid-range focal length of 135mm. From this view, you can start to see individual deep-sky objects like globular clusters and nebulae appear. You can also distinguish the areas of dark interstellar dust blocking bright starlight. ...
Some nebulae, such as the Horsehead, are a real challenge to find and observe. Nebulae are best viewed under low magnification, and rich-field telescopes can provide good views. Large aperture telescopes can gather enough light to produce bright images, and light pollution filters may help you ...
And that’s not all. It’s well worth investigating further and learning more about all the different deep sky objects waiting to be found.22There are many other multiple stars and nebulae visible throughout the year, not to mention open star clusters, globular star clusters, planetary nebulae...
We do not know much about the larger spacetime, but it is in principle possible to observe light and matter that comes from outside. How did our Universe end up inside a BH? If it collapsed to form one, why is it expanding now? As illustrated in Figure 4, the BHU has a ...