How many galaxies are there? Astronomers have an estimate, but accurately counting them depends on several factors.
There are about 100,000,000,000 stars in the Milky Way Galaxy.Some of these stars are much larger than the Sun and others are much smaller. There are trillions of galaxies in the universe. Dwarf galaxies (系) may have as few as ten million stars, and giant galaxies (巨星系) may...
According to astronomers, there are probably more than 170 billion galaxies in the observable Universe, stretching out into a region of space 13.8 billion light-years away from us in all directions. And so, if you multiply the number of stars in our galaxy by the number of galaxies in the ...
That much is pretty much agreed by all astronomers. What is less certain is how those first proto-galaxies relate to the mature galaxies we see today. Essentially there are two competing theories, called "top-down" and "bottom-up". The top-down theory, dating from 1962, came first. Accor...
Hubble used the light curves of the Cepheid variables to measure their distances from Earth and found that they were much farther away than the known limits of the Milky Way. Therefore, these spiral nebulae were indeed other galaxies outside our own. There are still many mysteries surrounding ...
We’ve got a many articles that are related to the amount of matter in the Universe here in Universe Today, likeHow Many Galaxies in the Universe, andHow Many Stars are in the Milky Way? NASA also has the following articles on the universe, likeHow many galaxies are there?and this arti...
How many spiral galaxies are there? How many irregular galaxies are there? How much data is one picture from the Hubble Telescope? How many stars are in the Milky Way Galaxy? How many feet long is the Hubble Telescope? How big is the Hubble Telescope's lens?
A general discussion, based on the "Fourier Slice Theorem", is given for the problem of deprojecting the observed light distribution of galaxies to obtain their intrinsic three dimensional light distribution or "shape". Several results are obtained : (1) A model-independent deprojection of an ...
Note that Andromeda is NOT the closest galaxy to us; there are actually several minor galaxies that lie much closer to us than the Andromeda Galaxy, but the latter is the closest large spiral galaxy. Now, think about this for a moment—Andromeda is 2.5 million light-years away...
How much do you know about the universe? In the huge universe, there is the Galaxy and many other galaxies. In the Galaxy, there is the Solar System and lots of other stars. In the Solar System, there is the sun, the earth and seven other planets. As we know, the eight planets go...