Table of Contents
What is a dead galaxy?
We Now Know Why There Are Dead Galaxies Floating Lost in The Void of Space. They’re smaller galaxies in terms of the number of stars, but they’re still spread out over great distances, making them faint and difficult to spot.
What types of characteristics about light from distant galaxies can astronomers use to infer what galaxies were like a long time ago?
What types of characteristics about light from distant galaxies can astronomers used to infer what galaxies were like a long time ago? The red shift of the galaxy; the spectrum of the light from a distant galaxy; The shape of a distant galaxy (spiral, irregular, elliptical, etc.)
Why do galaxies look bright?
As they report online today in Nature, a process known as cosmic recycling plays an important role. In this process, massive stars formed early in the life of a galaxy shine so brightly that the pressure of their radiation pushes lots of gas and dust out of the galaxy altogether.
What would space look like between galaxies?
The vast voids between galaxies can stretch millions of light-years across and may appear empty. But these spaces actually contain more matter than the galaxies themselves. “But when you add it all up, it’s somewhere between 50 and 80% of all the ordinary matter out there.” So, where did all this matter come from?
Can humans travel to another galaxy?
The technology required to travel between galaxies is far beyond humanity’s present capabilities, and currently only the subject of speculation, hypothesis, and science fiction. However, theoretically speaking, there is nothing to conclusively indicate that intergalactic travel is impossible.
What is the most beautiful galaxy?
NGC 2336 is the quintessential galaxy — big, beautiful, and blue — and it is captured here by the NASA/ESA Hubble Space Telescope.
What happens when two spiral galaxies collide?
A: When two spiral galaxies collide, gravity is the main force that comes into play. As the galaxies approach each other, gravitational forces start to pull the stars, gas, and dust of the spiral arms out of their original orbits. During the merger, the stars become scattered and their orbits become random.
Which of these galaxies is most likely to be oldest?
12 Cards in this Set
| Which of these galaxies is most likely to be oldest? | A galaxy observed at a distance of 5 billion light-years |
|---|---|
| If earths orbital radius doubled in size, | the parallax shifts of nearby stars would double in size |
Are older galaxies brighter?
Some of the oldest galaxies in the universe turn out to be brighter than expected, giving astronomers new insight into the conditions of the early universe.
Are all visible stars in our galaxy?
All the stars we see in the night sky are in our own Milky Way Galaxy. Our galaxy is called the Milky Way because it appears as a milky band of light in the sky when you see it in a really dark area.
Is the space between galaxies empty?
The space between stars is known as interstellar space, and so the space between galaxies is called intergalactic space. These are the vast empty spaces that sit between galaxies. Intergalactic space is as close as you can get to an absolute vacuum.
Can a star exist outside a galaxy?
Although stars cannot form in the voids between galaxies (since the density of matter is far too low), there are in fact large numbers of ‘intergalactic stars’. It has been estimated, for example, that 10 per cent of the mass of the Virgo galaxy cluster is in the form of these stellar interlopers.
https://www.youtube.com/watch?v=LPM9-JXoXKI