0
What else can I help you with?
What did astronomers learn from Hale Bopp?
Hale Bopp is a very special comet and astronmers learned a lot from it. They learned basic facts and always learned new facts.
What do astronmers call the red sky before sunrise?
Astronomers refer to the red sky before sunrise as the "morning twilight." This phenomenon occurs due to the scattering of sunlight by particles in the Earth's atmosphere, creating a reddish hue as the sun approaches the horizon.
Why must astronmers figure out a star's distance to calculate it's actual brightness?
For the same real brightness, at a larger distance it would look less bright. On the other hand, you may have two stars that look like they are the same brightness, but one might be million times brighter (in real brightness) than the other - which would be compensated by the fact that the brighter star is a thousand times farther away.
How did Ptolemy explain planet motion?
Ancient astronmers used shell theory. The earth was center, then came the moon, planets and sun, then other stars. At first it was a circular system. It seemed more "perfect", that degenerated into ellipses as the mathematics didn't work out.
What evidence do astronmers use to detect black holes?
Most of the methods to detect black holes rely on their gravitational effects. The following are ways in which black holes can be detected, at least in theory:Hawking radiation: This radiation would be way too weak to detect a stellar black hole, but it might be used to detect primordial black holes. This method hasn't been successfully applied yet; perhaps there are no primordial black holes.A black hole's gravitational effect on a neighboring object; for example, stars orbiting Sag A* make it possible not only to conclude that there is probably a black hole there, but also to estimate its mass (current estimate: about 4.3 million solar masses).Matter falling into the black hole will emit strong x-rays.An accretion disk around a black hole will heat up through friction, and also emit radiation.Gravitational lensing of objects behind the black hole also make it possible to detect a black hole in some cases (when there is a good alignment).
Who were the earliest astronmers?
i did. we went to countdown and back
What tools do astronmers use?
telescope,radio telescope
What planet do astronmers believe there is a lot of liquid water?
Neptune
What are some discoveries of the Roman Empire?
they were good engineers and built tons of roads. they were also very good astronmers
Why do you think it is hard for astronmers on Earth to lear about mercury?
because mercury is very near to the sun and its very hot.
What did astronomers learn from Hale Bopp?
Hale Bopp is a very special comet and astronmers learned a lot from it. They learned basic facts and always learned new facts.
What do astronmers call the red sky before sunrise?
Astronomers refer to the red sky before sunrise as the "morning twilight." This phenomenon occurs due to the scattering of sunlight by particles in the Earth's atmosphere, creating a reddish hue as the sun approaches the horizon.
Why do astronmers find it useful to retain the fiction of the celestial sphere to describe the sky?
Navigators, also, continue to use the concept of the "celestial sphere" because it makes the math easier. And for most purposes, it is accurate enough. The stars are all so far away, and move so little over a lifetime, that the sky IS essentially unchanging.
Why do astronmers now believe about Pluto's affecting uranu's and Neptune's orbits?
They believe it doesn't, because it doesn't to any measurable extent.The reverse is not true: Neptune has a very, very strong effect on Pluto's orbit. In fact, Pluto completes almost exactly three orbits for every two of Neptune's, and this is not a coincidence; such stable resonances are common.
Why must astronmers figure out a star's distance to calculate it's actual brightness?
For the same real brightness, at a larger distance it would look less bright. On the other hand, you may have two stars that look like they are the same brightness, but one might be million times brighter (in real brightness) than the other - which would be compensated by the fact that the brighter star is a thousand times farther away.
What is the reference system called that astronmers have invited to describe a stars location?
The main system is called geocentric coordinates and they are spherical coordinates just like latitude and longitude on the Earth's surface. The one that corresponds to latitude is declination, and it runs from 90 south through zero at the equator to 90 north. A star with a declination of, let's say 40 degrees north, will always pass vertically overhead at a town whose latitude is 40 degrees north. Instead of north or south, declinations are sometimes quoted as positive or negative. The other is normally called right ascension and it runs from 0 to 24 hours. That is because astronomers measure the time at which a star crosses the meridian, relative to the First Point of Aries crossing the meridian. The First Point of Aries is a major reference position and is a point on the equator where the ecliptic crosses it going north. Therefore it is the point where the Sun is, at the Spring Equinox when it crosses the Equator from a south declination to a north declination.
How did Ptolemy explain planet motion?
Ancient astronmers used shell theory. The earth was center, then came the moon, planets and sun, then other stars. At first it was a circular system. It seemed more "perfect", that degenerated into ellipses as the mathematics didn't work out.
