What evidence supports the existence of a black hole at the center of our galaxy?
The motions of the gas and stars at the center indicate that it contains 4 million solar masses within a region only 3 light-years across
. What is the most common form of gas in the interstellar medium? What is a shock wave?
What evidence supports the existence of a very massive black hole at the Centre 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.
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 is there of a black hole at the center of the Milky Way?
Astronomers have discovered evidence for thousands of black holes located near the center of our Milky Way galaxy using data from NASA’s Chandra X-ray Observatory. This black hole bounty consists of
stellar-mass black holes
, which typically weigh between five to 30 times the mass of our Sun.
What evidence can you give that the nucleus of our galaxy contains a supermassive black hole?
What evidence can you cite that the nucleus of the galaxy contains a supermassive black hole?
The largest stars in the galaxy are being pulled in a very fast orbit around something in the center at such high speeds they suggest the core has a mass of 4 million solar masses. Also quasars are present
.
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 is there for the existence of stellar black holes those produced from stars?
Radial velocity studies of X-ray binaries
provide the most solid evidence for the existence of stellar-mass black holes.
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 of the following is the best evidence for the existence of dark matter in the Milky Way?
Some of the best evidence for the existence of dark matter comes from
galaxy cluster 1E 0657-556, also known as the Bullet Cluster
. This cluster was formed after the collision of two large clusters of galaxies, the most energetic event known in the universe since the big bang.
What is the best evidence for supermassive black holes existing in the centers of other galaxies quizlet?
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 are the three types of evidence we have that there is dark matter in clusters of galaxies?
A stream of observations in the 1980s supported the presence of dark matter, including
gravitational lensing of background objects by galaxy clusters, the temperature distribution of hot gas in galaxies and clusters, and the pattern of anisotropies in the cosmic microwave background
.
What evidence can you give that our galaxy has a galactic corona quizlet?
What evidence can you give that our galaxy has a galactic corona? Our galaxy is believed to have a
massive galactic corona because the rotation curve of the galaxy does not decrease in
a Keplerian fashion when the orbital speeds of stars are measured at increasing distances from the nucleus.
Which of the following is the strongest piece of evidence that suggests a supermassive black hole exists at the center of the Milky Way?
An orbiting observatory has recorded an immense flare at the heart of the Milky Way galaxy
, providing what scientists say is the strongest evidence yet that a black hole with millions of times the mass of the Sun lurks there.
Did you know facts about black holes?
- You Can’t Directly See a Black Hole. …
- Our Milky Way Probably Has a Black Hole. …
- Dying Stars Lead to Stellar Black Holes. …
- There are Three Categories of Black Holes. …
- Black Holes Are Funky. …
- The First Black Hole Wasn’t Discovered Until X-Ray Astronomy was Used.
How did Einstein predict black holes?
Black holes are regions of spacetime where gravity’s pull is so strong that nothing, not even light, can escape from being dragged in and “eaten.” Einstein’s theory of general relativity predicted the existence of black holes and that, no matter what such an object “eats,” black holes are characterized only by their …
How does a black hole form from a massive star?
A black hole can be formed
by the death of a massive star
. When such a star has exhausted the internal thermonuclear fuels in its core at the end of its life, the core becomes unstable and gravitationally collapses inward upon itself, and the star’s outer layers are blown away.
What observational method has found most of the known black hole candidates?
Hubble observations
have been fundamental in the study of the jets and discs of matter around a number of black holes. Accurate measurements of the masses have been possible for the first time. Hubble has found black holes 3 billion times as massive as our Sun at the centre of some galaxies.
What evidence suggests that the Milky Way contains dark matter quizlet?
What evidence suggests that the Milky Way contains dark matter?
We observe clouds of atomic hydrogen far from the galactic center orbiting the galaxy at unexpectedly high speeds
, higher speeds than they would have if they felt only the gravitational attraction from objects that we can see.
What scientists know about black holes?
Since Penrose’s advances, astronomers have found a wealth of evidence for black holes. They found
stars orbiting invisible companions
, and they could see superheated gases glowing hot as they disappeared into putative black holes.
What evidence do we have that stars in the halo are older than other stars in our galaxy?
What evidence do we have that the spheroidal (bulge and halo) population of stars are older than other stars in the galaxy?
Most nearby stars move relative to the Sun at speeds below about 30 km/s.
What is a quasar quizlet?
What is a Quasar?
the extremely bright center of a distant galaxy, thought to be powered by a massive black hole
.
What is the evidence for dark matter in our galaxy?
Gravitational lensing and X-ray radiation from massive galaxy clusters
confirm the presence of dark matter. Galaxies and clusters of galaxies contain about 10 times more dark matter than luminous matter.
What evidence do we have that there is dark matter in the galaxy group of answer choices?
Scientists believe that dark matter in the
cluster accounts for the unexplained mass
. More recently, astronomers have used NASA’s Chandra X-ray Observatory to make the most detaile measurement yet of the distribution of dark matter in a massive cluster of galaxies.
What evidence do we have that there is dark matter in the galaxy quizlet?
The primary evidence for dark matter is that
calculations show that many galaxies would fly apart instead of rotating, or would not have formed or move as they do
, if they did not contain a large amount of matter beyond what can be observed.
What evidence supports the existence of supermassive black holes 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
.
Why are black holes black quizlet?
A black hole is a region in space where the pulling force of gravity is so strong that light is not able to escape. … Because no light can escape, black holes are
invisible
.
What is the largest supermassive black hole?
They can fit multiple solar systems inside of them.
Ton 618
, the largest ultramassive black hole, appears at the very end of the video, which, at 66 billion times the mass of the Sun, is going to weigh very heavily on how we daydream about the cosmos moving forward.
Which of the following best describe a black hole?
Which of the following best describes a black hole?
A place from which the escape velocity exceeds the speed of light
.
Which of the following is evidence for the existence of dark matter in the universe?
Which of the following is evidence for the existence of dark matter?
It has been shown from recent observations that the universe is not only expanding but that the expansion is accelerating
! … How is the motion of galaxies in our local group different from what we observe for distant galaxies?
What object is more massive than the sun but about the size of a city?
An object more massive than the Sun, but roughly the size of a city, is a:
neutron star
.
What evidence supports the proposition that there is a massive black hole of about 4 million times the mass of the sun at the center of our galaxy?
What evidence supports the existence of a very massive black hole at the center of our galaxy?
The motions of the gas and stars at the center
indicate that it contains 4 million solar masses within a region no larger than our solar system.
What are two pieces of evidence for the existence of dark matter quizlet?
What is the evidence for dark matter in clusters of galaxies? We have three different ways of measuring the amount of dark matter in clusters of galaxies:
from galaxy orbits, from the temperature of the hot gas in clusters, and from the gravitational lensing predicted by Einstein.
What evidence do astronomers have for supermassive black holes in galactic nuclei?
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.
What evidence is there that galactic cannibalism really happens?
This means
Tucana II absorbed an ancient galaxy and these stars are remnants of the ancient galaxy
. This is the first-ever real evidence of ‘galactic cannibalism’ found in deep space. Galactic cannibalism also happens when two galaxies merge into each other, becoming a massive galaxy.
What is the evidence that the universe was very uniform through its first 400 000 years?
What is the evidence that the universe was very uniform during its first 400,000?
It was too hot for atoms to form so everything was just an opaque sea of subatomic particles
. What is the difference between hot dark matter and cold dark matter?
When were black holes proven?
After decades of black holes being known only as theoretical objects, the first physical black hole ever discovered was spotted in
1971
.
Do scientists know what is found at the center of a black hole?
If Black Holes Are “Black,” How Do Scientists Know They Are There?
A black hole can not be seen
because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole.
Can a wormhole exist?
In the early days of research on black holes, before they even had that name, physicists did not yet know if these bizarre objects existed in the real world. The original idea of a wormhole came from physicists Albert Einstein and Nathan Rosen. …
