Press "Enter" to skip to content

How can we determine the mass of a galaxy cluster?

X-rays: Galaxy clusters are filled with superhot, 10- to 100-million-degree gas that shines brightly at X-ray wavelengths. Scientists use X-ray data from space telescopes to find and study massive galaxy clusters. They can use the measured properties of the gas to infer the clusters’ masses.

Why do astronomers think that galaxy clusters contain more mass than we can see?

According to the current understanding of how gravity works, the way the visible matter behaves indicates that there should be much more matter than we can detect — and therefore, much more mass exerting a gravitational influence — in objects in space, like stars in galaxies, or galaxies in clusters.

What is unusual about the results of mass determinations of clusters of galaxies?

What is unusual about the results of mass determinations of clusters of galaxies? There is much more mass than can be accounted for by the visible galaxies. Many of them collide head-on with nebulae in the other galaxy, causing large-scale star formation.

What evidence do we have that galaxies collide with one another?

Review 11) What evidence do we have that galaxies collide and merge? The clearest evidence is found in optical images of interacting galaxies such as the Antennae Galaxy or the Whirpool Galaxy which show the galaxies colliding and material being affected by the gravitacional forces of each galaxy.

What galaxy is the Milky Way going to collide with?

The Andromeda galaxy

Is there another galaxy like ours?

The Milky Way galaxy is in the Local Group, a neighborhood of about 30 galaxies. Our nearest major neighboring galaxy is called Andromeda.১৭ ফেব, ২০২১

How many planets are there in the universe?

Solar System

Planetary system
Stars 1 (Sun)
Known planets 8 (Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune)
Known dwarf planets 2 universally accepted (Pluto Eris) 1 more likely to be (Ceres) 2 more possible to be (Haumea Makemake)
Known natural satellites 575 (185 planetary 390 minor planetary)

What’s the most dangerous planet?

Venus