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Astronomy

The scientific study of celestial bodies. Find questions on Constellations, Planets and more.

23,887 Questions

What is the difference between earth-centered and sun-centered models of the solar system?

The heliocentric model suggests the theory that all of the planets in the solar system revolve around the sun. The geocentric model suggests the theory that the sun and all of the planets in the solar system, excluding Earth of course, revolve around the Earth.

When are you most likely to see a crescent moon?

Well, darling, you're most likely to see a crescent moon shortly after sunset or before sunrise. That's when the moon is positioned at an angle where only a small portion of it is illuminated by the sun, giving it that lovely crescent shape. So, grab a cocktail, sit back, and enjoy the celestial show!

What theory states that Earth is the center of the universe?

Geocentric Model, Earth centered ) developed by the Ancient Egyptians, e.g. Ptolemy. This model put the earth at the center of the cosmos and the earth is the origin point from which all other objects are referenced by angles. This model is still used in the Right Acension (RA) system.

Who discovered why earth has seasons?

The phenomenon of Earth's seasons is primarily due to the tilt of the Earth's axis relative to its orbit around the Sun. This was first explained by the ancient Greek astronomer, Eratosthenes, in the 3rd century BCE. He observed that the angle of sunlight hitting the Earth varies throughout the year, leading to the different seasons in each hemisphere.

Is the big dipper's real name the big dipper?

The Big Dipper's real name is actually Ursa Major, which is a constellation in the northern sky. The Big Dipper is an asterism, which is a recognizable pattern of stars within a constellation. It is formed by seven bright stars within the Ursa Major constellation. So while the Big Dipper is a commonly used name for this asterism, its true astronomical designation is Ursa Major.

Is the Aurora Borealis a painting?

NO!!!

It is a series of floating/flashing ccoloured lights seen in the Northern Night Sky, during winter.

It is caused by charged particles from the Sun impacting on the upper atmosphere.

There is a corresponding 'Aurora Australis'.

Aurora Borealis is the Latin name for 'Northern Lights'.

Aurora Australis is the Latin name for 'Southern Lights'.

Aurora ; Dawn (Latin)

Boreal ; North (Latin)

Austral ; South (Latin) .

Aurora

What is long and yellow and never rings?

The answer to this riddle is a banana. Bananas are typically long and yellow in color, and they do not have the capability to ring like a telephone or alarm clock. This riddle plays on the idea of a ringing sound being associated with objects that have that capability, such as phones or bells, which bananas do not possess.

What greek word does asteroid come from?

The word "asteroid" comes from the Greek word "asteroeidēs," which is a combination of "aster," meaning star, and "-oeidēs," meaning resembling. Therefore, "asteroid" translates to "star-like" or "resembling a star" in Greek. This term was first used in the early 19th century to describe the rocky objects orbiting the Sun between Mars and Jupiter.

Why is iron the heaviest element that can be formed in stars?

It isn't. Heavier elements are formed in stars as well. Iron is basically the heaviest element for which energy can be gained. When converting iron into heavier elements, energy is lost. However, this doesn't stop supernovae, at a temperature of about one gigakelvin (a billion degrees), to form heavier elements. In fact, the interior of stars is practically the ONLY way such elements can be formed.

What does CE mean when refering to years?

Oh, that's a happy little question! CE stands for "Common Era," and it's a way to refer to dates in the Gregorian calendar without using religious connotations. It's a gentle reminder that we all share this beautiful planet together, no matter our beliefs. Just like painting, it's all about finding harmony and understanding in the world around us.

Facts about Neptunes surface?

Neptune is actually the farthest planet from the Sun because Neptune's orbit is oval shaped. It takes Neptune 165 years to orbit the Sun. So each season on Neptune lasts for 40 years. ACTUALLY it takes neptune 164 years to revolve and 0.67 earth days to rotate

Earth and the Sun formed specifically from?

The bodies in the solar system formed from left over matter from an exploding star. The hydrogen coalesced into some of the gas giants, but the majority created the sun. Some of the remaining dust particles and heavier elements coalesced to form the inner planets, such as the Earth, Mars and Venus.

In which month the spring season come in different countries and calendars?

Countries in the Southern Hemisphere have spring during different months of the year than those in the Northern Hemisphere. Where people living in the UK and the U.S. have spring at the beginning of the year, those in countries like South America and Australia have spring between September and November.

How many stars are in grus constellation?

Oh, dude, the Grus constellation has like 27 stars visible to the naked eye. But honestly, who's counting, right? I mean, it's not like we're out here trying to win a star-counting contest or anything. Just look up, enjoy the view, and maybe make a wish on one of those bad boys.

If the sun does not move then why does your shadow move as the day goes on?

The apparent movement of the sun across the sky is due to the Earth's rotation on its axis. As the Earth rotates, different parts of the Earth receive sunlight at different times, causing the sun to appear to move in the sky. Your shadow moves throughout the day because the angle of the sunlight hitting you changes as the Earth rotates, creating different shadow lengths and positions.

How can I adjust the brightness of a dimming lamp?

To adjust the brightness of a dimming lamp, you can typically use a dimmer switch or remote control that is specifically designed for dimmable lights. These devices allow you to increase or decrease the brightness of the lamp to your desired level.

The number to the universe and everything in it?

999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999

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What is another name for Sirius?

Sirius is the brightest star in the night sky. With a visual apparent magnitude of �1.46, it is almost twice as bright as Canopus, the next brightest star. The name "Sirius" is derived from the Ancient Greek Seirios("scorcher"), possibly because the star's appearance was associated with summer. The star has the Bayer designation α Canis Majoris (α CMa, or AlphaCanis Majoris). What the naked eye perceives as a single star is actually a binary star system, consisting of a white main sequence star of spectral typeA1V, termed Sirius A, and a faint white dwarf companion of spectral type DA2, termed Sirius B.

Sirius is also known colloquially as the "Dog Star", reflecting its prominence in its constellation, Canis Major (English: Big Dog).[14] The heliacal rising of Sirius marked the flooding of the Nile in Ancient Egypt and the "Dog Days" of summer for the Ancient Greeks, while to the Polynesians it marked winter and was an important star for navigation around the Pacific Ocean.

What are the names of famous Greek astronomers?

There are dozens. "Famous" for astronomy, or "famous" for other reasons? Carl Sagan, Edwin Hubble, James Lick, George Hale, to name a very few.

Which planet receives the least amount of energy from the sun?

Out of the eight remaining major planets, Neptunereceives the least amount of Sun energy.

The planet Neptune receives less solar heating than any other major planet, being farthest from the Sun. With a high internal heat, Neptune actually releases more than two-and-a-half times more energy than it receives.

Dwarf planets farther out than Pluto (e.g. Sedna, Eris) receive only a tiny, inconsequential bit of radiation from our Sun, which would appear as just a bright star at their great distance.

* Uranus, however, is the "coldest" planet, apparently due to its lower internal heat, lower tidal friction with moons, and its peculiar orientation with respect to the plane of its orbit.

What will happen when the earths polarity reverses?

Very little. Magnetic compasses will cease working. By the time earth's polarity flips most cars will probably have on board GPS units instead of electromagnetic compasses.

Bird migration paths may suffer some disruption.

Skin cancer rates are expected to slightly rise. Other than that, most people will continue on about their daily lives without knowing or caring.

What Happend 4500 Years Ago?

4500 years ago was approximately 2500 BC. This was the time of the early Bronze Age, when many civilizations around the world were developing writing systems, advanced agriculture techniques, and complex social structures. It was also around the time of the construction of Stonehenge in England and the Great Pyramid of Giza in Egypt.

What is convention in terms of science?

In science, a convention refers to a commonly accepted practice, agreement, or standard that is followed by the scientific community. This can include things like units of measurement, experimental procedures, or the way data is presented. Conventions help ensure consistency, reproducibility, and communication between scientists.

What is the significance of the phrase "look to the western sky wicked" in the context of the story?

The phrase "look to the western sky wicked" in the story signifies a warning or a sense of impending danger coming from the west. It suggests that something sinister or troubling may be approaching from that direction, adding tension and suspense to the narrative.

What color will a star be with a surface temperature of 5000-6000K?

A star with a surface temperature of 5000-6000K will appear white to yellow-white in color. This temperature range corresponds to a star of spectral type F, which emits a significant amount of visible light across the spectrum, giving it a white to yellowish hue. The color of a star is determined by its surface temperature, with hotter stars appearing bluer and cooler stars appearing redder.