What unit of measurement is used to measure distances beyond the solar system? How to convert light years to kilometers or kilometers to light years? What color of stars are the co... What unit of measurement is used to measure distances beyond the solar system? How to convert light years to kilometers or kilometers to light years? What color of stars are the coldest and hottest? How many light years away should the stars be when comparing the absolute magnitude? What is a red shift and what does it indicate? What is the big bang theory? And what is some evidence that astronomers have seen to theorize that the big bang happened? What are the different types of galaxies? And what type of galaxy is the Milky Way? What is luminosity? What does it mean for a star to have a luminosity of 5 compared to the Sun? What is an apparent magnitude and absolute magnitude? What is a parallax angle? What is a parallax method? What is the luminosity of the Sun? Know the different components of the H-R Diagram. Know the life cycle of a star, average size and massive size. What size of a star would potentially become a black hole? A neutron star? A white dwarf?
Understand the Problem
The question is inquiring about various concepts in astronomy including measurements for distances, characteristics of stars, and cosmology theories. It seems to provide information and asks for clarification on several terms and concepts related to space and star classification.
Answer
Light-years are used beyond the solar system. 1 light-year ≈ 9.461 trillion km. Coldest stars are red; hottest are blue. Milky Way is a spiral galaxy. Redshift shows objects moving away, supporting Big Bang theory.
For distances beyond the solar system, astronomers use light-years. One light-year is approximately 9.461 trillion kilometers. The coldest stars are red, and the hottest are blue. The Milky Way is a spiral galaxy. Redshift indicates objects are moving away, supporting the Big Bang theory.
Answer for screen readers
For distances beyond the solar system, astronomers use light-years. One light-year is approximately 9.461 trillion kilometers. The coldest stars are red, and the hottest are blue. The Milky Way is a spiral galaxy. Redshift indicates objects are moving away, supporting the Big Bang theory.
More Information
A light-year is the distance light travels in a year. It helps measure vast cosmic distances. A star's color indicates its surface temperature: red stars are cooler, and blue stars hotter. These concepts are part of understanding cosmic structure and movement.
Tips
Confusing light-years with time, mixing up color-temperature relation: Blue is hot, red is cool.
Sources
- Units for Distance and Size in the Universe - lco.global
- Light-year - Wikipedia - en.wikipedia.org
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