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Continue Learning about Astronomy

How long does it take before a nebula turns into a protostar?

A star life cycle takes millions of years. Some stars even last for billions of years, which can be older than our universe.


Can gravitational force act at a distance?

If it didn't everything in the universe would have gone flying apart long ago and there would be no universe!


According to the Big Bang Theory how have the density and temperature of the universe changed over time?

The "big bang" theory is still relatively new. British astronomer Sir Fred Hoyle came up with the term "big bang" as a derogatory term in the 1950's, because Hoyle was a life-long believer in the "steady state" theory of the universe.


The idea that Earth was the center of the universe is an example of that has long been discarded.?

the answer is a hypothesis


What is one of the primary unaswered questions about the origin of the universe?

It was what came before the big bang, and the big bang theory states that the universe started as a dense nucleus of matter: a huge amount of matter concentrated in a tiny spot. This is the conclusion of equations and evidences that prove that the universe has been and continuous to expand: since it has been expanding, there was a moment when it was as small and dense as it is possible . So, the expansion is the result of violent explosion. The time during which the expansion has been happening (this is how long ago the big bang occurred) has been estimated thanks to the observation of the speed of recession of the galaxies, but nothing can be told about what came before the big bang occurred .

Related Questions

How long was the universe dark before there was light after the big bang?

It wasn't really DARK, at least not at first; what with the enormous temperatures and the large amount of radiation it had. The Universe got TRANSPARENT at an age of about 380,000 years; the so-called "Dark Ages" span the time after this, until the Universe had an age of somewhere between 150 million and 800 million years, which is when the first stars formed.


How long was Vermont a republic before it became a state?

24


How long were gliders around before they became operative?

1821


Where is St. Michael the Archangel's birthplace?

St. Michael the Archangel was not born. He was created by God as an angel in Heaven long before the Universe existed.


How long was it before Rosa became an American?

10 yaers before rosa praks was a america


When was St. Michael born?

All the angels in Heaven are venerated as Saints, & Michael in particular, as he was the angel who took the initiative in defending Our Lord's Reign in the universe, from the rebellious angels.


When was Saint Michael created?

St. Michael was created long before the Universe even existed.


How long was Charlemagne a king before he became emperor?

768-800


What is the country of origin of the word plant?

Italy but long before it became Italy


When was Saint Gabriel the Archangel made?

God created Gabriel as an angel long before our universe even existed.


Where and when was Archangel Michael born?

St. Michael was not born. He was created as an archangel by God long before the universe existed.


When was Saint Gabriel created?

Gabriel and all the other angels were created by God long before the universe existed.