Measured ages of globular clusters and a study of the time required for massive stars to build up the present abundance of heavy elements suggests that the universe is
Q: An important part of the lifecycle of galaxies like the Milky Way is the self regulation of…
A: Required : The correct choice.
Q: What was the temperature of the universe when the recombination took place that produced the cosmic…
A: Around 400,000 years after the big bang, the space was completely filled with a hot soup of…
Q: The objects that are detected at the points where the gas of a radio jet hits the extragalactic…
A: The quasar are small and the powerful source if energy that is active core of very distant galaxies.
Q: If galaxy A is three times more distant than galaxy B, then according to the Hubble law, galaxy A…
A: According to Hubble's law, the recession velocity is proportional to the proper distance of the…
Q: The number of stars in the Milky Way Galaxy is approximately
A: Number of stars in Milky way galaxy
Q: Heavier elements like carbon, nitrogen and iron are spread out into space mainly through a.…
A: Some 14 billion years ago, a massive explosion occurred which is called the big bang. It created the…
Q: How the universe expands?
A: The expansion of the universe is just the increase in distance between any two selected…
Q: The expansion age of the universe is about _________ a) 1 billion years b) 10 billion years c)…
A: To find: The expansion age of the universe is about
Q: What is the densest subsatnce in the universe?
A: At a modest temperature and pressure the most densest element on Earth surface is Osmium.
Q: If we find a galaxy that is moving away at 72,000 km/s, what does Hubble’s law tells us about the…
A:
Q: What is Big Bang theory?
A: Astronomers have given several theories and facts for the galaxies moving away from our galaxy.…
Q: Distance of stars are measured in A) Galactic unit B) seller mile C) Cosmic Kilometre D) Light…
A: Many astronomical objects like stars or galaxies are very far away from the earth & giving their…
Q: Stars formed after the Big Bang had cooled down. From globular cluster dating and from stellar…
A: All of the matter and energy in the universe was once confined to a singularity with infinite…
Q: Describe the distribution of globular clusters within the galaxy, and explain what that implies…
A: The distribution of globular clusters within the galaxy, and explain what that implies about the…
Q: Theory predicts that the irregularities in the hot gas of the big bang should be how many degrees in…
A: The cosmologists analyze the irregularities within the intensity of the CMB using sophisticated…
Q: What happened before the Big Bang?
A: The Answer is given below:
Q: State the grand unified theory.
A: There are four fundamental forces in nature: Electromagnetic forces. Gravitational forces. Strong…
Q: If a very distant galaxy looks overall "blue" to astronomers, from this they can conclude that: O…
A: A region with many young stars appears blue in color. High-mass stars live fast and die young, using…
Q: About what percentage of the universe is believed to be composed of normal matter? O 5% O > 22% O…
A: 68% of the matter is dark energy. 27% of the matter is dark matter. Rest less or equal to 5% is…
Q: closed system consisting of 2 lb of a gas undergoes a process during which the relation between…
A:
Q: Hubble's Law Constant provides the following information about the observable universe: galaxies…
A: Hubble's law constant, often denoted as H₀ provides an estimate of the current rate of expansion of…
Q: In a Universe with Ω=1, without the presence of dark energy, the expansion of the Universe would a.…
A: Dark energy is the energy present in our universe in a high amount which is something 60% and many…
Q: Evidence that much of the mass of the universe consist of dark energy has come from __________ a)…
A: To find: Evidence that much of the mass of the universe consist of dark energy has come from
Q: If the Hubble's constant was 100 km/s/Mpc instead of 70 km/s/Mpc what would be the estimated age of…
A: It was observed that the galaxies were moving away from us. Edwin Hubble calculated their recession…
Q: What evidence shows that the universe is flat
A: Exact shape of the universe can not be predicted.
Q: Astronomy: The best current evidence is that the rate of expansion of the universe over time is, a.…
A: This question is from astronomy and astrophysics.
Q: In the standard model, about when after the Big Bang did the universe become transparent to…
A: Ans is :- C
Q: There exists an element visible in the spectrum of galaxies that shows the following spectra when…
A: Introduction: The Doppler effect refers to the apparent shift in the wavelength of a wave when there…
Q: The first stars to form in our galaxy a. had circular orbits. b. had highly elliptical…
A: Population 1 stars are the newer and younger stars.
Q: Assume that the orbital speed of a star is measured at a distance of 15 kpc from he center of our…
A:
Q: Doppler-shift technology can be used to determine a star's technology has provided evidence that the…
A: Doppler shift is used to determine whether a star is moving towards us or moving away from us.
Q: 6) The redshift of a galaxy is observed to be 1.5. Calculate the recessional velocity of the galaxy.
A: Redshift takes place when the source is moving away from the observer. This reduces the frequency…
Q: After the Big Bang the Universe expanded and cooled. What was the temperature of the Universe when…
A: All of the universe's matter and energy were once concentrated in a singularity with infinite…
Q: 4) Calculate the redshift of a galaxy with a recessional velocity of 0.68c. (
A: When a celestial object is moving away from the observer the light observed from the object will…
Q: The oldest globular clusters are a. 3 to 4 billion years old. b. 6 to 7 billion years old.…
A: The oldest globular clusters is NGC 121 around 9 to 10 billion years old.
Q: What is the approximate temperature of the universe that we currently observe? a. 0 K b. 2.7 K…
A: The temperature of the universe recently measured by the scientists is 2.73 Kelvin.
Q: Was the Big Bang an explosion? Explain your answer.
A: the Big Bang wasn't an explosion that destroyed things.
Q: We believe that the big bang occurred 13.8 billion years ago. Give 3 reasons why scientists believe…
A: There are several lines of evidence that support the idea that the universe is 13.8 billion years…
Q: In an open universe, the overall geometry of the Universe would be a. flat b. spherical c.…
A: There are generally three possible shapes of the universe, namely 1)flat universe 2)spherical…
Q: Olbers’s paradox deals with which of these questions? a. Is the universe accelerating? b. Why…
A: Olbers’ paradox deals with: b. Why is the sky dark at night?
Q: To what extent do astronomers have the ability to see into the history of the universe?
A: Introduction: We are all aware that time travel is not feasible, so an astronomer cannot use A time…
| a. |
at least 20 billion years old.
|
|
| b. |
no more than 10 billion years old.
|
|
| c. |
about 14 billion years old.
|
|
| d. |
flat.
|
|
| e. |
closed.
|
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
