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How big was the sun?
The sun's diameter-its widest measurements-is estimated at 865,400 miles.
Why did Aristarchus make his measurements of the Sun's distance at the time of quarter moon?
Because when the Moon is at a "Quarter Phase", exactly half of the Moon's face is lit by the Sun. That means the Sun-Moon-Earth angle is 90 degrees. He could use that fact to estimate the Moon's distance by geometry.
What is helioseismology and what does it tell us about the sun?
"Helio-" means "concerning the Sun". The Greek god Helios was the god of the Sun, and anything including the prefix "helio" has something to do with the Sun. For example, the element "helium" was first discovered in spectroscopic examinations of the Sun, and only later was found to exist here on the Earth. "Seismology" concerns earthquakes, or vibrations in the Earth's crust. So, "helioseismology" refers to the study of the surface of the Sun.
Why do some planets take longer to revolve?
Because they are farther away from the sun, and the sun is what they revolve around, so they have a longer distance to go. That obviously makes the day longer on that planet, along with all other time measurements. Some planets take longer to revolve because of their distance to the sun. The further a planet is, the more distance it has to cover and the weaker the sun's gravitational pull is. Planets farther away from the sun move more slowly, and have more distance to cover.
How many light years is the heliopause to the sun?
Voyager 1 was able to perform measurements and establish the distance as 121 AU (18 billion km). This would make the distance about 0.0019 light years.
How big was the sun?
The sun's diameter-its widest measurements-is estimated at 865,400 miles.
What unit of measurements do you use for the distance between sun and earth?
Astronomical units. (It's 1 from the earth to the sun)
What has the author David H Hathaway written?
David H. Hathaway has written: 'Doppler measurements of the Sun's meridional flow' -- subject(s): Solar activity, Measurements, Active regions
What are the measurements of the sun?
1.392×106 km D, 1.9891×1030 kg M, and 5,778 K
How is the Greek development system of measurement using sun measurements important to ancient civilization?
The basis for a calendar.
Measurements indicate that a certain star has a very high luminosity 100000 times your sun but yet has a temperature that is cooler than the sun?
It could be a main sequence star.
What main conclusion did Shapley draw from his measurements of the distances to the globular clusters?
The sun is far from the center of the Milky Way.
How do you get the distance of a planet from the sun?
we measure the distance between satellites with the help of relative measurements using different techniques.
What has the author Pietro Biadigo written?
Pietro Biadigo has written: 'Meridiano infallibile' -- subject(s): Sun, Time measurements
Astronomers find that light coming from point A at the edge of the sun has a slightly higher frequency than light from point B at the opposite side What do these measurements tell us about the sun's?
This observation infers that the Sun is spinning on its own axis
What is the evidence that the sun revolves around the sun.?
Photo evidence from the Hubble Telescope (and various rockets). Before, that periodicity measurements were used (e.g. seasons,, as one example, as well as the precession of the planets)>
What is the diameter of the Sun from pole to pole?
The Sun is ENORMOUS compared to other objects in the solar system! It is so massive that is accounts for 99.9% of all of the matter in the solar system. In fact, the Sun is so big that if it were hollow, you could fit over one million Earth's inside of it! The way that the Sun's diameter is measured is by first taking a ngular diameter measurements and then translating them to linear diameter measurements. The angular diameter of the Sun, or more precisely of the photosphere, can be measured by using telescopes especially during total solar eclipses or by timing Mercury when it is in transit in front of the Sun. The first series of measurements were taken in the early 1700's by Jean Picard in Paris, France.
