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A Alex P
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We know mass, radius, distance of Sun and other stars. We also know size, number of stars in our galaxy or others. But, how do scientists measure these parameters ?
How do scientists measure mass, radius, and distance in astronomy?
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- Thread starter A Alex P
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In summary, scientists can measure the mass, radius, and distance of stars, including the Sun, using various methods such as parallax and spectroscopy. The number and size of stars in our galaxy and others can also be determined. As for how these parameters are measured, it is recommended to do some research on "astronomic distance measurement" as a starting point. This topic is typically at an intermediate level, suitable for undergrad students. Any further questions can be asked after reading more about it.
- #2
BvU
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Intermediate level means undergrad -- or did you pick this by accident ?
Can you google "astronomic distance measurement" ?
Any further questions after you've read some of that are welcome, of course.
Can you google "astronomic distance measurement" ?
Any further questions after you've read some of that are welcome, of course.
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A Alex P
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It was a mistake. Thanks for noticing : ) : )BvU said:
I know these methods. But how we can say that sun is at that much distace or its mass.
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BvU
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It's PF culture to encourage posters to do some research of their own 
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A Alex P
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It's good. But what's answer... : ) : )BvU said:It's PF culture to encourage posters to do some research of their own
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BvU
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Last time I looked the question wasn't there yet...
What did you find ? Google is your friend. Whole story (and at the right level)
What did you find ? Google is your friend. Whole story (and at the right level
)1. What is the importance of measurements in astronomy?
Measurements in astronomy are crucial for understanding and studying the vastness of the universe. They help us determine the size, distance, and properties of celestial objects, as well as track their movements and changes over time.
2. How do astronomers measure the distance to stars and galaxies?
Astronomers use a variety of techniques to measure the distance to stars and galaxies, such as parallax, redshift, and standard candles. Parallax involves measuring the slight shift in an object's position when viewed from different points, while redshift measures the stretching of light waves from distant objects. Standard candles, such as supernovae, have a known brightness that can be used to calculate their distance.
3. Can measurements in astronomy be affected by human error?
Yes, measurements in astronomy can be affected by human error, just like in any other field of science. Astronomers must carefully calibrate their instruments and account for any sources of error, such as atmospheric conditions or technical limitations, to ensure accurate measurements.
4. How do astronomers measure the mass of celestial objects?
Astronomers use the laws of gravity and motion to calculate the mass of celestial objects. By observing the orbital paths of objects, such as planets or binary stars, astronomers can determine their mass based on the strength of their gravitational pull.
5. How have advancements in technology improved measurements in astronomy?
Advancements in technology, such as telescopes and space probes, have greatly improved measurements in astronomy. They allow us to gather more precise data from farther distances and in a wider range of wavelengths, providing a more comprehensive understanding of the universe.
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