0
What else can I help you with?
Why do scientist study the light coming from distant galaxies?
They study distant galaxies because they want to know whats out in other galaxies and how many planets it has
How far away are the most distant galaxies?
That is impossible to answer because scientist don't know ALL the galaxies.
Why do scientist see the galaxies if they were millions and billions of years ago?
The galaxies beyond our own are millions to billions of light years away, meaning the light takes millions to billions of years to get here.
Why do scientist use light years when making astrononmical oberservations?
Light years is the distance light travels in one year. They do this because other galaxies are too far away to measure in kilometres. The numbers would be too long
Starburst galaxies are especially bright in visible light ultraviolet light or infrared light?
Starburst galaxies are especially bright in infrared light because the high rate of star formation results in a lot of dust being heated up, which emits infrared light. This makes starburst galaxies stand out at these wavelengths compared to their normal counterparts.
What do scientist know about the size of the universe?
We know that we have observed galaxies out to as much as 14 billion light years from us in every direction, and we have never seen an end to it yet.
What does the light from distant galaxies show red shift?
The light from distant galaxies shows redshift because the universe is expanding. As the galaxies move away from us, the light they emit gets stretched, causing its wavelength to increase and shift towards the red end of the spectrum. This redshift can help scientists determine the velocity at which galaxies are moving away from us and provide insights into the expansion of the universe.
How do scientist use ultraviolet light to study galaxies?
Scientists use ultraviolet (UV) light to study galaxies because it provides information about the hottest and most energetic processes occurring within them. UV observations can reveal the presence of young, massive stars, as these emit significant amounts of UV radiation. Additionally, UV light helps in understanding the composition and behavior of interstellar gas and dust, as well as the formation and evolution of galaxies over time. Instruments like the Hubble Space Telescope and the upcoming James Webb Space Telescope are equipped to capture UV wavelengths, enabling detailed studies of distant galaxies.
Why do scientist study distant galaxies to learn about early galaxy's?
If you look at a distant galaxy, the light from the galaxy has travelled for perhaps a hundred million years, a billion years, or up to an age close to the age of the Universe (13 billion years or so), depending on the galaxy's distance. Thus, the light you see shows you how the Universe was billions of years ago.
When do scientist use light-years?
That is usually measured for large distances, such as the distance to other stars, or even to other galaxies. Another unit, the "parsec", is also common in this case.
Do galaxies emit light?
Yes, galaxies emit light primarily from the stars within them. This light can range from visible light to other forms of electromagnetic radiation such as radio waves, infrared, ultraviolet, and X-rays. The light emitted by galaxies allows astronomers to study their composition, age, and distance from Earth.
The size of galaxies are measured in?
They are measured in light years. Galaxies are often 100,000 light years across or more.
