36 Best Universe Questions and Answers (Q&A) - ProProfs Discuss

What is the smallest thing in the Universe?

C. Block, English Professor
Answered: Dec 22, 2020

It was a popularly thought some several decades ago that the atom was the smallest thing in the universe, following Dalton’s model where he defined Atom as the smallest, indivisible...Read More

4 Answers

524 views

How does the discovery of radiations coming from all directions in space support the big bang theory?

N. Kingsley, Writer
Answered: Sep 18, 2018

The CMB radiation was emitted 13.7 billion years ago, only a few hundred thousand years after The Big Bang. It was even before stars or galaxies existed. By studying the detailed physical...Read More

2 Answers

490 views

What is the difference between Galaxy and Universe?

Howard Reyes, Science Teacher
Answered: Jul 31, 2019

There are tens of thousands of galaxies and our galaxy, The Milky Way, is just one of them. Galaxies have many shapes and sizes; however, they have the commonality of gravity, stars, gases, dust,...Read More

3 Answers

391 views

What does a SETI program stand for?

C. Marcus, Content Developer
Answered: Oct 05, 2018

SETI program stands for Search for Extraterrestial Intelligence. The acronym was formed in the 1960's. The program describes the works of astronomers who were in search of evidence of existence...Read More

1 Answer

364 views

What is a light year and how it is measured?

C. Marcus, Content Developer
Answered: Oct 05, 2018

According to the definition given by International Astronomical Union (IAU), a light year is the distance that light travels in a vacuum. A light year is a unit used to express and measure...Read More

1 Answer

312 views

How many celestial bodies are there in the solar system?

L. Sevigny, Doctor
Answered: Oct 05, 2018

The exact number of celestial bodies is unknown. It is believed that they are billions of celestial bodies. Celestial bodies include Sun, Planets, natural Satellites, Comets, Asteroids, Stars,...Read More

1 Answer

298 views

What technology is capable of travelling to the edge of the Universe?

Bobby Rickets, Content Reviewer
Answered: Nov 22, 2018

There are some people who wish that they would be able to reach the edge of the universe but they are not sure how they are going to do it. Some have speculations that when you reach the edge of...Read More

1 Answer

292 views

Why do cosmologists say that the Universe is constantly expanding?

Carice Snow, Motivator
Answered: Nov 22, 2018

There are a lot of cosmologists that are saying that the universe is still continuing to expand as time passes by. The galaxy is said to be expanding faster than light. Some say that this is...Read More

2 Answers

288 views

What is the shape of Universe?

L. Hawkes, Teacher
Answered: Oct 05, 2018

The exact shape of the universe is still a matter of debate among scientists. The shape can be described by the critical density. If the density of the universe is more than the critical de...Read More

1 Answer

285 views

What are celestial bodies?

M. Kennedy, Web Content Writer
Answered: Oct 05, 2018

Celestial bodies, also known as heavenly bodies are natural bodies that exist outside the earth's atmosphere. Examples of celestial bodies are: Sun, Moon, Stars, Asteroids, Kuiper belt, Comets,...Read More

1 Answer

277 views

How big is the Universe?

Carice Snow, Motivator
Answered: Nov 22, 2018

There are a lot of speculations about how big the universe is. One thing is for sure, the universe is surely vast. According to some reports, the universe may be about 93 billion light years if...Read More

1 Answer

267 views

What is the farthest known part of our Solar System?

Ts
Answered: Apr 18, 2024

The Oort Cloud

1 Answer

266 views

Can we consider a star a celestial body?

M. Kennedy, Web Content Writer
Answered: Oct 05, 2018

Yes, a star can be considered as a celestial body. By definition, celestial bodies is any object that exist outside the earth's atmosphere. Stars are large balls of hot gases, they produc...Read More

1 Answer

263 views

How do scientists know that the Universe is 49 billion years old?

Bobby Rickets, Content Reviewer
Answered: Nov 22, 2018

Research shows that the universe has existed for 13.8 billion years. There are different methods that they use. The first one is they measure the oldest items that they can find in the universe....Read More

1 Answer

254 views

What is the primary function of SETI?

L. Hawkes, Teacher
Answered: Oct 05, 2018

The primary function of SETI is to explore, understand and explain the origin of life in the universe and the evolution of intelligence and to use the knowledge gained to inspire and guide the...Read More

1 Answer

252 views

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