How was the Hubble constant discovered?
How the Hubble constant was discovered. The Hubble constant was first calculated in the 1920s, by American astronomer Edwin Hubble. By knowing how bright a Cepheid truly is and how dim its light appeared when seen from Earth, Hubble was able to derive the Cepheid’s distance.
Which Hubble plot belongs to the youngest universe?
Which Hubble plot belongs to the youngest universe? Figure 4 has a slower expansion rate so it would be the youngest universe.
Why is Andromeda moving toward us?
All things in the Universe are speeding away from us, it’s just that gravity is a much stronger force at local levels. This is why the Solar System holds together, and why Andromeda is moving towards us and in about 4 billion years or so, the Andromeda galaxy is going to slam into the Milky Way.
Do galaxies die?
Galaxies die when the stars that live in them stop forming. Now, for the first time, astronomers have witnessed this phenomenon in a distant galaxy. Scientists were able to glimpse a galaxy as it ejected almost half of the gas it uses to form stars.
What often happens when two spiral galaxies collide?
When the galaxies collide, it causes vast clouds of hydrogen to collect and become compressed, which can trigger a series of gravitational collapses. A galaxy collision also causes a galaxy to age prematurely, since much of its gas is converted into stars.
When two galaxies collide they pass through each other and their stars almost never collide?
When two galaxies collide, they pass through each other and their stars almost never collide. Elliptical galaxies contain more gas, dust, and young stars than do Sa galaxies. The center of the universe is more crowded with galaxies than any other place in the universe.
When galaxies collide What is the most likely outcome quizlet?
what are wimps? what happens when galaxies collide? The result is “cartwheel” galaxy, about 150 MPC from the Earth, its halo of yong stars resembling a vast ripple in a pond. THe ripple is most likely a densityw ave created by the passage of the smaller galaxy through the disk of the larger one.