what is the difference between a star and a galaxy?
527927
A star is a small (relatively) ball of plasma that is generally sufficiently gravitationally compacted to initiate nuclear fusion in its core. A galaxy is about 10 billion or more of the above, all gravitationally bound to each other.
1202665
When you look up into the night sky, stars are the bodies that appear to twinkle and have fixed locations relative to each other. Planets, on the other hand, don't twinkle and they move relative to the stars.
42991
What is the difference between an asterism and a constellation? Give examples. An asterism is a recognizable pattern of stars, while a constellation is a well-defined region in the sky.
404046
The main difference: the Solar System includes our sun “Sol” and all the planets and mini planets asteroids and comets that orbit it, is a system around 1 star. A galaxy is a group of stars arranged in a cluster or mass of many stars often billions or even trillions of stars.
786024
Size and mass The Milky Way is the second-largest galaxy in the Local Group (after the Andromeda Galaxy), with its stellar disk approximately 170-200 000 light years in diameter and, on average, approximately 1,000 ly (0.3 kpc) thick.
1283678
Galaxies are sprawling systems of dust, gas, dark matter, and anywhere from a million to a trillion stars that are held together by gravity. Nearly all large galaxies are thought to also contain supermassive black holes at their centers.
816112
Stars are star-shaped because of imperfection in our eyes Most stars are much like the Sun—giant balls of gas burning billions of miles away. These spherical stars pump out a steady stream of light that crosses vast stretches of space before it illuminates the night sky.
155113
A constellation is the imaginary pattern formed by a few stars. There are 81 known constellations. A galaxy is group of millions or even billions of stars, and it's planets and satellites and all of the stuff. Galaxies can be of these shapes- Spiral, barred spiral, elliptical and irregular.
432249
The Parts of the Sun. ... The sun is a star, just like the other stars we see at night. The difference is distance -- the other stars we see are light-years away, while our sun is only about 8 light minutes away -- many thousands of times closer.
99089
If its mass is great enough for fusion to occur, it's a star. So the biggest difference between a star and a planet is that a sun is massive enough for fusion.
1401119
What is the difference between a giant star and a supergiant star? Giant stars have radii between 10 and 100 solar radii and luminosities between 10 and 1,000 times that of the Sun. Whereas Supergiants have radii between 30 and 1,000 solar radii and luminosities between 30,000 and 100,000 times that of the Sun.
792162
They are the building blocks of galaxies, of which there are billions in the universe. It's impossible to know how many stars exist, but astronomers estimate that in our Milky Way galaxy alone, there are about 300 billion.
717019
The most fundamental difference between the galaxy types is that spiral galaxies have a rotating disk of gas in which ongoing star formation can occur, while elliptical galaxies do not. Therefore, once gas is stripped out of a galaxy, it can no longer have a gaseous disk.
751897
Galaxies are held together by gravitational attraction,much like a solar system. Billions of stars make up our galaxy, including our sun. The galaxy that our solar system is a part of is the Milky way. The Milky Way is one of billions of galaxies found in the universe.
402874
Stars form immense groups called galaxies. A galaxy can contain many millions of stars, held together by the force of gravity. Our Sun is in a spiral galaxy called the Milky Way. The Sun is about half-way from the centre of the galaxy, on one of the arms.
1268783
The generally accepted difference is one of formation; stars are said to have formed from the "top down", out of the gases in a nebula as they underwent gravitational collapse, and thus would be composed almost entirely of hydrogen and helium, while planets are said to have formed from the "bottom up", from the ...
650089
The celestial object that has a fixed path (orbit), in which it moves around the star, are known as Planets. Stars have their own light, whereas planets do not have their own light, they reflect the sunlight that falls on the planets. ... The temperature of a star is very high, while that of a planet is low.