Galaxies.
Galaxies.
The Milky Way is a galaxy made up of billions of stars of which our solar system is a part. A constellation is a grouping of stars in apparent proximity that form identifiable patterns. Both are made up of stars.
a constellation
A star cluster or a constellation can be a name given to a close knit grouping of stars. A group of constellations will form a galaxy..
2.5 billion in numbers is written as 2,500,000,000. This is because each comma represents a grouping of three digits in the numerical system. The first comma separates the millions place from the thousands place, and the second comma separates the thousands place from the ones place. Therefore, 2.5 billion is equivalent to 2,500,000,000 in numerical form.
An asterism is a grouping of stars that form a recognizable pattern within a constellation. It is not an officially recognized constellation, but rather a grouping of stars within a constellation that may have cultural or historical significance. Examples include the Big Dipper in Ursa Major and the Summer Triangle formed by three bright stars in different constellations.
A grouping of stars that form a recognizable pattern or shape in the sky as seen from Earth.
About 4.6 billion years ago.
About 4.6 billion years ago.
Stars that now exist within our Milky Way -- indeed, all stars themselves -- did not exist till about 13 billion years ago. Our galaxy did not take its present form till about nine billion years ago.
To write 10 billion in standard form, you would write it as 10,000,000,000. This is because each comma represents a grouping of three digits, making it easier to read large numbers. In this case, there are three groups of three zeros after the initial 10.
Not necessarily. In simplest form, 600 billion solar masses simply means that something is 600 billion times more massive than the sun, regardless of what it is. The sun is more massive than the average star, so if we are talking about stars alone, then 600 billion masses would be equivalent to more than 600 billion stars. It would also depend on what the context is. For example if a galaxy is 600 billion solar masses, much of that mass would be in interstellar gas and dust clouds in addition to stars.