Which Of The Following Does Not Accurately Describe What We Observe Toward The Galactic Center?

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What evidence supports the theory that there is a black hole at the center of our galaxy quizlet?

What evidence supports the theory that there is a black hole at the center of our galaxy? The motions of the gas and stars at the center indicate that it contains a million solar masses within a region only about 1 parsec across.

Which constellation lies in the direction toward the galactic center?

The Galactic centre is the point about which our Galaxy is rotating. It is located roughly 24 000 light years from the Solar System in the direction of the constellation Sagittarius but cannot be seen in optical light due to heavy obscuration by interstellar dust grains along the line of sight.

What kind of object do we think lies in the center of the Milky Way galaxy?

We live in the Milky Way Galaxy which is a collection of stars gas dust and a supermassive black hole at it’s very center. Our Galaxy is a spiral galaxy which are rotating structures that are flat (disk-like) like a DVD when looked upon edge-on.

What do astronomers believe is located at the center of the Milky Way galaxy?

At the center of the Milky Way Galaxy is a supermassive black hole. The region where the black hole is located is called Sagittarius A* (prounounced “A star”). … Astronomers believe that only about 10% of the mass of our galaxy comes from stars gas and dust.

What evidence supports the existence of a black hole at the center of our galaxy?

What evidence supports the existence of a black hole at the center of our galaxy? Several stars have been observed to rotate an object in the center of our galaxy. The only possibility of having such a large mass in such a small volume is a black hole.

What evidence is there for a supermassive black hole at the center of our galaxy?

Direct evidence for a supermassive black hole – a plot of the orbital motion of the star S2 around the centre of the Milky Way. From these observations astronomers have inferred that a supermassive black hole of about 3 million solar masses lurks at the centre of our galaxy.

Which direction is the Galactic Center?

The Galactic Center is approximately 8 kiloparsecs (26 000 ly) away from Earth in the direction of the constellations Sagittarius Ophiuchus and Scorpius where the Milky Way appears brightest visually close to the Butterfly Cluster (M6) or the star Shaula south to the Pipe Nebula.

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Which of the following is not an astrological constellation?

There are 12 constellations in the zodiac family. They can all be seen along the ecliptic. They are: Aries Taurus Gemini Cancer Leo Virgo Libra Scorpius Sagittarius Capricornus Aquarius and Pisces. The Sun also passes through Ophiuchus and Cetus but these constellations are not part of the zodiac.

Which constellation lies in the direction of the Centre of our galaxy quizlet?

Terms in this set (45) The center of our galaxy is located in the direction of the constellation of Orion.

What kind of object do we think lies at the center of the Milky Way galaxy quizlet?

The orbits of stars in the center of the galaxy indicate that the presence of 3 to 4 million solar mass object in a region no larger than our Solar System. How does the diameter of the disk of Milky Way Galaxy compare to its thickness?

How do we know the Sun is not at the center of the Milky Way?

How do we know that the sun is not at the center of the Milky Way? The distribution of globular clusters shows the Sun is not at the center of the Milky Way. The Herschels attemped to etermine the galaxy’s structure by: systematically counting stars in each direction.

What features of the Milky Way’s appearance in our sky led scientists to conclude that it is much wider than it is thick quizlet?

What features of the Milky Way’s appearance in our sky led scientists to conclude that it is much wider than it is thick? The Milky way is the narrow band made of many resolvable stars. Why did they scientists originally believe that the Sun was near the Milky Way’s center?

What do astronomers believe is located at the center of the Milky Way galaxy quizlet?

Astronomers believe that the center of our Galaxy has a black hole with enough mass inside to make almost 4 million Suns! How do astronomers think a black hole could acquire so much mass?

How did astronomers determine where Earth is located within the Milky Way?

The Earth’s place in the galaxy was determined largely by an astronomer named Harlow Shapley. … Thanks to the regular periods of these stars and their presence in globular clusters Shapley was able to map the distances to a number of clusters.

Whats in the center of the Milky Way?

At its center surrounded by 200-400 billion stars and undetectable to the human eye and by direct measurements lies a supermassive black hole called Sagittarius A* or Sgr A* for short. The Milky Way has the shape of a spiral and rotates around its center with long curling arms surrounding a slightly bulging disk.

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What is the best evidence for an extremely massive black hole in the center of the Milky Way quizlet?

Terms in this set (26)

Best evidence for an extremely massive black hole in the center of the milky way? The orbits of stars in the center of the galaxy indicate that the presence of over 3-million-solar-mass object in a region about 3/4 the size of the orbit of mercury.

What evidence leads astronomers to believe that they have detected black holes?

What evidence leads astronomers to believe that they have detected black holes? They have seen X rays perhaps from gas around a black hole suddenly disappear as a companion star eclipses the hole. The radius of a body at which its escape velocity equals the speed of light.

What observational evidence do we have that black holes exist quizlet?

What observational evidence do we have that stellar-death black holes really exist? Some X-ray binaries have unseen objects with masses greater than 3 solar masses.

What is the evidence of black holes?

The best evidence of stellar-mass black holes comes from binary star systems in which (1) one star of the pair is not visible (2) the flickering X-ray emission is characteristic of an accretion disk around a compact object and (3) the orbit and characteristics of the visible star indicate that the mass of its …

What is the evidence for a black hole at the center of the Milky Way quizlet?

Astronomers have found convincing evidence for a super massive black hole in the center of our own Milky Way galaxy the galaxy NGC 4258 the giant elliptical galaxy M87 and several others. Scientists verified the existence of the black holes by studying the speed of the clouds of gas orbiting those regions.

What is the best evidence for supermassive black holes existing in the centers of other galaxies?

What is the best evidence for supermassive black holes existing in the centers of other galaxies? Detailed observations of stars and gas clouds very near the centers of galaxies show that they are rapidly orbiting a very massive object that we can’t see.

What does the galactic center look like?

If you lived in the center of the Milky Way you would look up at a sky thick with stars up to 1 million times denser than we’re used to seeing. … At its heart—and the dominant force in that area of the galaxy—is a black hole one million times the mass of the Sun called Sagittarius A* (pronounced “Sagittarius A star”).

When can you see the galactic center?

The Galactic Center is visible from February to October and not visible from November to January. People living in the southern hemisphere enjoy visibility longer because the peak occurs in winter when days are shorter and nights are longer.

What degree is galactic center?

This point currently resides around the 27th degree of Sagittarius and corresponds to the centre of the Milky Way galaxy – the most abundant source of gravitational energy in the galaxy and analogous to our Sun’s own “Sun”.

What is not a constellation?

The Big Dipper is not a constellation! It is part of Ursa Major the Greater Bear. The Big Dipper is an asterism a recognized but not official grouping of stars. Some asterisms fall within a single constellation others cross constellations.

Which of the following is a constellation?

Their names are Sagittarius Capricornus Aquarius Pisces Aries Taurus Gemini Cancer Leo Virgo Libra Scorpius and Ophiuchus. These constellations are well known because of their use in astrology. All but one Ophiuchus corresponds to a “birth sign” or “star sign”.

How are astrological signs determined?

Zodiac signs were originally determined by which constellation the Sun was “in” on the day you were born. … Thus they calculated that each constellation extends 30 degrees across the ecliptic. However a phenomenon called precession has altered the position of the constellations we see today.

Which of the following is not a characteristic of stars in the disk of our galaxy?

Which of the following is not a characteristic of the stars of the disk component of our galaxy? randomly inclined orbits. You just studied 45 terms!

Why can’t we see the center of our galaxy with our eyes quizlet?

Why can’t we see the center of our galaxy with our eyes? Interstellar dust and gas absorbs and scatters visible light before it can reach us from the center. … Theories of galaxy formation tell us that the halo formed earlier than the disk.

What is in the center of our galaxy group of answer choices?

At the center of the galaxy is the galactic bulge. … The galaxy is surrounded by a spherical halo of hot gas old stars and globular clusters. Although the halo stretches for hundreds of thousands of light-years it only contains about two percent as many stars as are found within the disk.

What type of object has been proposed to explain the tremendous activity detected at the center of the Milky Way galaxy quizlet?

What type of object has been proposed to explain the tremendous activity detected at the center of our Galaxy? gravitational influence on visible stars. smaller and pulse faster than Cepheids. a class of clusters of stars that are associated with a galaxy but lie outside the plane.

How do the stars orbit the center of the galaxy quizlet?

How do disk stars orbit the center of the galaxy? They all orbit in roughly the same plane and in the same direction. They follow spiral paths along the spiral arms. They follow orbits that move up and down through the disk typically taking them about 50 000 light-years above and below the disk on each orbit.

What settled the debate on whether or not spiral nebulae were inside the Milky Way’s boundaries?

The debate was over whether or not the spiral nebulae was within the Milky Way galaxy. Shapley believed the spiral nebulae was within our galaxy Curtis argued that the spiral nebulae could be its own rotating star system. There was no “winner” in the end because neither had sufficient proof to back up their theories.

Who proved that the Sun is not at the center of the Milky Way galaxy?

Harlow Shapley

Harlow Shapley (born November 2 1885 Nashville Missouri U.S.—died October 20 1972 Boulder Colorado) American astronomer who deduced that the Sun lies near the central plane of the Milky Way Galaxy and was not at the centre but some 30 000 light-years away.

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