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Astronomy is considered a science which deals in the study of celestial objects and phenomena. It uses a combination of chemistry, mathematics and physics to try and explain and understand the mysteries of the universe. The study of Astronomy includes taking note of planets, moons, stars, nebulae, galaxies, meteoroid, asteroid, and comets.
A nebula is a huge cloud of combined gas and dust in space. It can contain hydrogen, helium, and/or plasma. They are sometimes considered nurseries, because oftentimes they are the location where stars are created and born. Nebulae, which is the plural form (more than one) of nebula, form when gas, like hydrogen and helium, as well as molecules ...
A constellation is a name given to a group of stars in the sky that make up a certain pattern. Sometimes this pattern is imaginary. When the sky is clear these stars can be seen from Earth without the use of a telescope. There are 88 named constellations, and they take many forms, including mythological creatures, animals, people and objects.
This means a nova is a star that suddenly gets very bright for a short period of time. However, a nova is a little more complex than just a star that gets very bright. A number of occurrences and events must happen for a star to become a nova. Before the ability to see deep into space with modern instruments, astronomers would call a new star a ...
Key Facts & Summary. Stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores. Aside from our Sun, stars appear as dots of light in the sky. Each and every one of them is light-years away from us and much brighter than our own star, the Sun.
3. Backyard Astronomy: An Introduction to Stargazing. Just as the title suggests, this course is designed for everyone to learn about the stars that they can see from their own backyard. The course teaches you what you are able to see outside with different instruments, including the eye, binoculars, or a telescope.
White dwarf stars have a prevalence of around 0.4%, and their spectral type is usually D. White dwarf stars have temperatures of around 8,000 to 40,000 K, and they have luminosities of around 0.0001 to 100 times that of the Sun. A white dwarf’’s faint luminosity comes from the emission of stored thermal energy.
Key Facts & Summary. Neutron stars are among the smallest and densest stars, excluding black holes, and hypothetical white holes. Neutron stars typically have a radius of 10 km / 6.2 mi and a mass of around 1.4 to 3.2 solar masses. Neutron stars result out of supernova explosions of massive stars, combined with gravitational collapse, which ...
They are usually blue because the scattering is more efficient for blue light. Reflection nebulae and emission nebulae are often seen together and are sometimes both referred to as diffuse nebulae. (NGC 7023 shown) Dark Nebulae. Dark nebulae are clouds of dust which are simply blocking the light from whatever is behind.
Asterisms | Facts, Information, History & Definition. The Nine Planets. Asterisms Facts & Information. An asterism may be understood as an informal group of stars within the area of an official or defunct former constellation. Keep reading for even more facts and information on well known Asterisms. Planets.