What causes galaxies to look different?
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What causes galaxies to look different?
Galaxies have very dynamic shapes, meaning that they can change over time. For example, if a galaxy is left alone and undisturbed for a long time they become more flat, elliptical and spiral shapes whilst galaxies that have been disturbed, or rather, collided with another galaxy become more spherical and round.
What causes different stars to be different Colours?
The color of a star is linked to its surface temperature. The hotter the star, the shorter the wavelength of light it will emit. The hottest ones are blue or blue-white, which are shorter wavelengths of light. Cooler ones are red or red-brown, which are longer wavelengths.
What are galaxy Colours?
Why are galaxies the colors that they are, like when we see them through telescopes they are blue, white, red, sometimes purple or a mixture of colors. patches of red/pink: a so-called HII (“H-two”) region. This is a cloud of ionized hydrogen (a cloud of free protons and electrons).
What causes nebula color?
The process is similar to that of a neon light. This causes the nebula to glow. Emission nebulae tend to be red in color because of the abundance of hydrogen. Additional colors, such as blue and green, can be produced by the atoms of other elements, but hydrogen is almost always the most abundant.
2. Do the colours of galaxies seem related to their shapes? Explain. As a general rule, elliptical galaxies are yellowish, while spirals and irregulars look more bluish.
Why are stars different colors NASA?
What does a star’s color mean? The brightness of a star is related to how much energy it puts out, as well as how close it is to Earth. Stars also vary in color – because they vary in temperature. Hotter stars appear blue or white, while cooler stars look orange or red.
Why are there no green or purple stars?
Stars emit light over a whole range of wavelengths (or colours). There are no green stars because the ‘black-body spectrum’ of stars, which describes the amount of light at each wavelength and depends on temperature, doesn’t produce the same spectrum of colours as, for example, a rainbow.
Are galaxies really colorful?
Galaxies are not actually as colorful as we think they are Space emits a range of wavelengths of light, some we can see others we can’t. However it doesn’t record any color but it has got filters which enable it to capture only a certain required wavelength of light.
Why is the galaxy purple?
The purple areas that appear fuzzy are thought to be superheated gas left over from supernova explosions of giant stars. The Whirlpool Galaxy is merging with another smaller galaxy in the top left corner of the image, and astronomers think the two galaxies slamming into each other is creating a wave of star formation.
What causes green nebula?
If oxygen is present, it emits a very saturated green wavelength that changes the color of the nebulae making them teal, cyan, green, or even bluish-white. High oxygen content is common in Planetary Nebulae, making them often appear greenish. Figure 1. The Horsehead and Great Nebulae (M42) in Orion.
Why are some galaxies blue in color?
Other galaxies, like irregulars or star burst galaxies, may be mostly blue in color, indicating a large fraction of young massive stars dominate; giant elliptical galaxies consist of mostly older populations of stars and appear yellow-whitish in color.
What is the color of elliptical galaxies?
Large elliptical galaxies have a yellowish color. The small ellipticals, called dwarfs, have a shade tending towards blue. Spiral galaxies have a triple coloration. The arms are clearly blue, while the core tends in a clear way to yellow.
What does your galaxy’s appearance look like?
Some stars are red hot…some are yellow hot…and some are white hot! Some are so hot they even look blue. So if you’re a new, young galaxy with lots of massive hot stars, you’ll look white or blue. Middle aged, average stars like the Milky Way? You’ll look yellowish. Old stars that tend to grow and cool? You’ll be a reddish galaxy.
What is the color of a dwarf galaxy?
The small ellipticals, called dwarfs, have a shade tending towards blue. Spiral galaxies have a triple coloration. The arms are clearly blue, while the core tends in a clear way to yellow.