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.
Which of the following best summarizes 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 the best definition of dark matter?
Definition: Dark Matter is referred to the hypothetical matter that scientists have not been able to locate in the universe – either through telescopes or using any other technological method. … Its existence came to the fore because of its gravitational effects on matters that are visible in the universe.
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.
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.
Why is dark matter called dark matter?
Dark matter is called “dark” because it does not appear to interact with the electromagnetic field, which means it does not absorb, reflect, or emit electromagnetic radiation (like light) and is, therefore, difficult to detect.
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.
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.
When was dark matter first theorized?
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.
Why is dark matter called dark matter quizlet?
Why do we call dark matter “dark”? It emits no radiation that we have been able to detect. … The flat rotation curves of spiral galaxies tell us that they contain a lot of dark matter.
What does Hubble’s law tell us?
Hubble’s Law states that an object’s recessional velocity is proportional to the distance from the observer.
Which of the following best describes what we mean by gravitational lensing quizlet?
Which of the following best describes what we mean by gravitational lensing? A massive object bends light beams that are passing nearby. Which of the following is an example of ordinary (baryonic) matter? you.
Which of the following best describes how the Drake equation is useful?
Which of the following best describes how the Drake equation is useful? It helps us understand what we need to know to determine the likelihood of finding other civilizations. … Suppose it turns out that one in 1 million stars has a planet that at some point in its history is home to an advanced civilization.
What is antimatter and dark matter?
Antimatter is the inverse of matter, with all particles of the atom being the opposite particle, so when matter and antimatter come in contact in the sun, they are annihilated with a release of photons. Dark matter is simply “transparent matter”, a partial inversion of the atom, perhaps with a different quantum phase.
Are black holes dark matter?
Dark matter — which has never been directly observed — is thought to constitute the majority of matter in the universe and act as the unseen scaffolding upon which galaxies form and develop. … A black hole is a point in space where matter is so tightly compacted it creates intense gravity.
What is the difference between dark matter and dark energy?
And what’s the difference between dark energy and dark matter? In short, dark matter slows down the expansion of the universe, while dark energy speeds it up. … Dark energy is the far more dominant force of the two, accounting for roughly 68 percent of the universe’s total mass and energy.
Where is the dark matter?
The first variety is about 4.5 percent of the universe and is made of the familiar baryons (i.e., protons, neutrons, and atomic nuclei), which also make up the luminous stars and galaxies. Most of this baryonic dark matter is expected to exist in the form of gas in and between the galaxies.
How did dark matter form?
When the Universe became less fluid, the protons, electrons and neutrons were frozen into place, wherever their ripple had left them. … And if dark matter was present so early in the Universe, it probably was formed in the big bang.
How is dark matter measured?
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 is dark matter and dark energy 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 might be causing the expansion of the universe to accelerate.
What is dark matter astronomy quizlet?
dark matter. Matter that does not give off electromagnetic radiation. dark energy. A mysterious force that appears to be causing the expansion of the universe to accelerate.
What makes dark matter and dark energy so important quizlet?
What makes dark matter and dark energy so mysterious? Dark matter is Matter that we infer to exist from its gravitational effects but from which we have not detected any light. Dark matter apparently dominates the entire mass of the universe.
What is dark matter Answer Key?
Dark matter defines how the objects in the Universe were made, and it also determines the fate of the Universe, whether it’s open, closed, or flat. Dark matter also governs the motions of individual stars and the motions of galaxies as a whole. It makes the galaxies and large structures form.
Where is dark matter located quizlet?
– analysis suggests that most of this mass is located in the spheroidal halo that surrounds the disk of our galaxy. > because we have detected very little radiation coming from this enormous amounts of mass, it qualifies as dark matter.
What is dark matter by NASA quizlet?
Dark Matter is the name given to mass that emits no detectable radiation; we infer its existence from its gravitational effects.
What is dark matter dark energy?
Only five percent of the universe is visible. … The rest of the universe appears to be made of a mysterious, invisible substance called dark matter (25 percent) and a force that repels gravity known as dark energy (70 percent).
What is dark matter Vera Rubin?
Vera Rubin didn’t “discover” dark matter, but she put it on the map. Dark matter is a wild concept. It’s the idea that some mind-boggling percentage of all the matter in the universe may be invisible, and wholly unlike the matter that makes up Earth.
Is dark matter A neutrinos?
Neutrinos are a form of dark matter, because they have mass, and weakly interact with light. But neutrinos have such a small mass and high energy that they move through the universe at nearly the speed of light. For this reason, they are known as hot dark matter.
What is dark matter made of?
These possibilities are known as massive compact halo objects, or “MACHOs”. But the most common view is that dark matter is not baryonic at all, but that it is made up of other, more exotic particles like axions or WIMPS (Weakly Interacting Massive Particles).
Which is a characteristic of dark matter quizlet?
Dark matter is matter that gives off little or no light. Dark energy is the name given to whatever it is that is causing the universe’s expansion to accelerate.
What is the evidence of dark matter 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 statement about dark matter is accepted by most astronomers quizlet?
Which statement about dark matter is accepted by most astronomers? Dark matter interacts with ordinary matter through the gravitational force.
https://youtube.com/watch?v=DB377EO7EKY
What is redshift theory?
‘Red shift‘ is a key concept for astronomers. The term can be understood literally – the wavelength of the light is stretched, so the light is seen as ‘shifted’ towards the red part of the spectrum. Something similar happens to sound waves when a source of sound moves relative to an observer.
Where does dark matter reside in our galaxy?
Bottom line: Astronomers in Stockholm say their new technique has revealed dark matter in the inner Milky Way galaxy, including the area in which our sun and Earth reside.
How does gravitational lensing tell us about the mass of a galaxy cluster?
How does gravitational lensing tell us about the mass of a galaxy cluster? The lensing allows us to determine the orbital speeds of galaxies in the cluster, so that we can determine the mass of the cluster from the orbital velocity law.
What happens to gas as it freely expands quizlet?
What happens to gas as it freely expands? It gets more dense and heats. It gets more dense and cools.
Dark matter is an invisible form of matter that makes up most of the universe’s mass and creates its underlying structure. Dark matter’s gravity drives normal matter (gas and dust) to collect and build up into stars and galaxies. … This phenomenon is called gravitational lensing.
Which of the following best describes why the Drake equation is useful in the study of Astrobiology?
Which of the following best describes why the Drake equation is useful in the study of astrobiology? It helps us think about the factors that would determine the likelihood that we could discover other civilizations.
What is the purpose of the Drake equation quizlet?
– Drake Equation- lays out the factors that are important in determining the number of transmitting civilizations. The more we learn the better estimate we can have. Nhp- number of habitable planets in the galaxy. Fnow- is the fraction of the civilization bearing planets that currently have a civilization.
How is intelligence defined in the Drake equation quizlet?
How is intelligence defined in the Drake Equation? a civilization willing and able to communicate over interstellar distances. The factor fnow, in the Drake equation depends on. how long civilizations survive once they have arisen.
What are the properties of dark matter and dark energy?
In brief, dark matter attracts, dark energy repels. While dark matter pulls matter inward, dark energy pushes it outward. Also, while dark energy shows itself only on the largest cosmic scale, dark matter exerts its influence on individual galaxies as well as the universe at large.
What does dark matter look like?
So the researchers based their model off the most commonly held theory about dark matter: that it consists of weakly interacting massive particles, or WIMPs, that are 100 times the mass of ordinary protons yet weakly charged. … They found that across the board, dark matter organizes itself in the same halo-like pattern.
What is dark matter manipulation?
Dark Matter Manipulation is the ability to control Dark Matter, which is a hypothetical form of matter that gets it’s name from the fact it can’t be interacted with electromagnetic radiation, such as light.