In the first second of the universe, the universe cooled and inflated. A result is a separation of one unified force into four distinct forces.
The Milky Way galaxy is part of
The Milky Way galaxy is part of
Dark energy is the name of the
Dark energy is the name of the
Seyfert galaxies are spiral galaxies with active cores.
Seyfert galaxies are spiral galaxies with active cores.
The Large and Small Magellanic Clouds are satellites galaxie…
The Large and Small Magellanic Clouds are satellites galaxies of the Milky Way.
The mass of the black hole at the center of our galaxy can b…
The mass of the black hole at the center of our galaxy can be estimated using the ____ of a star orbiting it.
If the Universe is closed and finite, then
If the Universe is closed and finite, then
As viewed edge-on, we can see all the spurs and branches off…
As viewed edge-on, we can see all the spurs and branches off the arms of the Milky Way galaxy.
The density of the Universe is
The density of the Universe is
Some large clusters of galaxies do not appear to contain eno…
Some large clusters of galaxies do not appear to contain enough mass to hold themselves together.