What is dark matter, and what evidence exists for it? What effect does dark energy have on the expansion of the universe?

Q: The cosmic microwave background consists of: huge clouds of dark matter interspersed with equally…

A: Cosmic microwave background also known relic radiation. Cosmic microwave background is kind of…

Q: What is a mass difference, and how does it arise?

A: To explain: Mass difference.

Q: All of the matter that we know (dark matter excluded) is made out of quarks and leptons. HINT: The…

A: Quark is the elementary particle that consists of fractional electronic charges. It is a fundamental…

Q: What is Big Bang theory?

A: Astronomers have given several theories and facts for the galaxies moving away from our galaxy.…

Q: energy

A: Dark energy is contributing to 70 % of the universe and this is causing the universe to expand and…

Q: The Big Bang that began the universe is estimated to have released 1068 J of energy. How many stars…

A:

Q: How would you explain spacetime to an unschooled person?

A: The solution is highly intricate, yet time and space are intimately connected. Because it takes time…

Q: What is the the steady-state theory of the universe, and why was it abandoned? What theory do we…

A: A per the Steady-State theory, the universe is always expanding but it is maintaining a constant…

Q: What does the size difference of the irregularities in the background radiation tell us about the…

A:

Q: Is the universe open or closed?

A: the universe as "closed," "open," or "flat," meant that the density of the universe was either so…

Q: How black holes made us?

A:

Q: What exactly is dark matter?

A: Particles that do not absorb, reflect, or emit light, hence cannot be detected by electromagnetic…

Q: What is dark matter and how do we know it exists?

A: Dark matter is the invisible form of matter which can not be directly detected but its effect can be…

Q: Describe what is meant by Olbers’ paradox. Explain how it is solved by our modern understanding of…

A: Olbers' paradox explains the dark effect of the sky. It is also known as the dark night sky paradox.…

Q: What is “dark energy”? What is “dark matter”? Why do some scientists think it is everywhere, while…

A: We live in a universe where a lot of space seems to have nothing but a vacuum. A majority portion of…

Q: What is the twin paradox?

A: the twin paradox is a thought experiment in special relativity involving identical twins, one of…

Q: According to the standard Big Bang theory (neglecting any effects of cosmic acceleration), what is…

A: Hubble constant = 50 km/s/Mpc age of universe = inverse of hubble constant  = 1/(50 km/s/Mpc ) Using…

Q: Please list 4 different forms of energy present in the universe?

A: Given that: Please list 4 different forms of energy present in the universe?

Q: Which one best explains dark matter? The resurgence of Newtonian physics or Einstein’s cosmological…

A: Dark matter and dark energy

Q: What does it mean that energy in the universe is “conserved” ?

A: solution is given as

Q: Why is dark energy required to explain the universe as we see it today according to the Big Bang…

A: in this question we discuss about dark energy .

Q: To what does cold refer to the term "cold dark matter"? Why do models of large-scale structure agree…

A: The term cold in “cold dark matter” indicates the slow motion of dark matter in comparison to the…

Q: What was the typical density of the universe, when the microwave background radiation was last…

A: Cosmic Microwave Background The cosmic microwave background (CMB) is idea to be leftover radiation…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.