Table of Contents
What is the scientific evidence for dark matter?
Primary evidence for dark matter comes from calculations showing that many galaxies would fly apart, or that they would not have formed or would not move as they do, if they did not contain a large amount of unseen matter.
Which of the following is the best description of dark matter?
Which of the following best describes dark matter? It is very large and invisible. Accretion is defined as: Gravity that pulls matter in a spiraling matter.
Which of the following statements best summarizes current evidence concerning dark matter in individual galaxies?
Which of the following statements best summarizes current evidence concerning dark matter in individual galaxies and in clusters of galaxies? Dark matter is the dominant form of mass in both clusters and in individual galaxies. What is the distinguishing characteristic of what we call ordinary (or baryonic) matter?
Which of the following best summarizes what we mean by dark energy Which of the following best summarizes what we mean by dark energy?
Which of the following best summarizes what we mean by dark energy? It is the energy contained in dark matter
How do scientists explain dark matter?
Scientists study dark matter by looking at the effects it has on visible objects. Scientists believe that dark matter may account for the unexplained motions of stars within galaxies. Other scientists believe that dark matter may be composed of strange particles which were created in the very early universe.
What was the first evidence for the existence of dark matter?
The first real evidence for dark matter came in 1933, when Caltech’s Fritz Zwicky used the Mount Wilson Observatory to measure the visible mass of a cluster of galaxies and found that it was much too small to prevent the galaxies from escaping the gravitational pull of the cluster.
Which is evidence for the existence of dark energy?
The first evidence for dark energy came from supernovae observations in 1998 and further evidence arrived earlier this year from a survey of 250,000 galaxies. The latest evidence comes from observations of gravitational lensing.
Is there evidence for dark matter in our solar system?
All the evidence for dark matter and dark energy seem to be way out there in the cosmos. It seems very suspicious that we don’t see any evidence of it here in our own solar system. No one has ever reported any anomaly in the orbits of the planets. Yet these have all been measured very precisely.
What type of matter is dark matter?
Most scientists think that dark matter is composed of non-baryonic matter. The lead candidate, WIMPS (weakly interacting massive particles), have ten to a hundred times the mass of a proton, but their weak interactions with normal matter make them difficult to detect.
What is dark matter quizlet?
Dark matter is the name given to the unseen mass whose gravity governs the observed motions of stars and gas clouds. Dark energy is the name given to whatever may be causing the expansion of the universe to accelerate.
Which one of the following is evidence of dark matter?
Strong evidence for the existence of dark matter comes from observations of: clusters of galaxies. A photograph of a cluster of galaxies shows distorted images of galaxies that lie behind it at greater distances.
What is dark matter example?
Dark matter is the term astronomers use to describe material in the universe that does not emit or reflect light and is, therefore, invisible. Stars, nebulae, and galaxies are examples of luminous objects in the sky.
Which of the following provides evidence for the existence of dark matter in individual galaxies?
Strong evidence for the existence of dark matter comes from observations of: clusters of galaxies. A photograph of a cluster of galaxies shows distorted images of galaxies that lie behind it at greater distances.
Which of the following is evidence of dark matter in the universe?
Dark matter and normal matter have been wrenched apart by the tremendous collision of two large clusters of galaxies. The discovery, using NASA’s Chandra X-ray Observatory and other telescopes, gives direct evidence for the existence of dark matter. These results are direct proof that dark matter exists.
What is the best evidence for dark matter in galaxies 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.
Which of the following best summarizes what we mean by dark matter which of the following best summarizes what we mean by dark matter?
Which of the following best summarizes what we mean by dark matter? It is a name given to whatever is causing the expansion of the universe to accelerate withtime.
What is dark matter which of the following best summarize the definition of dark matter?
Which of the following best summarizes what we mean by dark matter? matter that we have identified from its gravitational effects but that we cannot see in any wavelength of light.
What is meant by dark energy quizlet?
What is dark energy? (AKA cosmological constant) Dark energy is the name given to the mysterious force that counteracts the effects of gravity on larger scales, and leads to the acceleration in the universe’s expansion.
How do scientists define dark matter?
dark matter, a component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity. Dark matter makes up 30.1 percent of the matter-energy composition of the universe; the rest is dark energy (69.4 percent) and ordinary visible matter (0.5 percent). Fast Facts.
How do scientists know dark matter exists?
We can detect the dark matter through gravitational lensing, which detects shifts in light produced by distant celestial objects [5]. The bright spots outside the colored areas are stars and galaxies that are not part of the Bullet Cluster (Credit: X-ray: NASA/CXC/CfA/ M.
What provided the first evidence for dark matter?
Chandra X-ray Center, Cambridge, Mass. Dark matter and normal matter have been wrenched apart by the tremendous collision of two large clusters of galaxies. The discovery, using NASA’s Chandra X-ray Observatory and other telescopes, gives direct evidence for the existence of dark matter.
What is the evidence that dark matter exists?
We can detect the dark matter through gravitational lensing, which detects shifts in light produced by distant celestial objects [5]. The bright spots outside the colored areas are stars and galaxies that are not part of the Bullet Cluster (Credit: X-ray: NASA/CXC/CfA/ M.
When was dark matter first introduced?
Although the first evidence for dark matter was discovered in the 1930s, it was in the early 1980s that astronomers became convinced that most of the mass holding galaxies and clusters of galaxies together is invisible.
