Cosmology and Theories of the Universe

The cosmic theory proposes that the universe began with a singular explosion followed by a burst of inflationary expansion.

Guth's inflation model addresses the horizon problem and the flatness problem.

The Steady-State Theory posits that the universe has no beginning or end and maintains a constant density through the continuous creation of matter.

<p>Georges Lemaître formalized the Big Bang Theory, which developed from the observation that galaxies are moving away from each other.</p> Signup and view all the answers

<p>Newton's Principia allowed scientists to apply scientific principles to analyze and explain the heliocentric nature of the solar system.</p> Signup and view all the answers

<p>The essential components of the heliocentric model include the Sun, planets, and their satellites.</p> Signup and view all the answers

<p>The Big Bang Theory suggests a definite beginning for the universe, while the Steady-State Theory posits that the universe has always existed without a beginning or an end.</p> Signup and view all the answers

<p>Quantum fluctuations in the early universe are thought to be magnified during inflation, leading to the formation of galaxies and clusters.</p> Signup and view all the answers

<p>The Accretion Theory suggests that the solar system formed from a rotating nebula, where collisions caused dust to stick together, forming larger chunks of matter.</p> Signup and view all the answers

<p>The Protoplanet Theory posits that a dense interstellar cloud forms clusters of stars, with smaller blobs coalescing into planets, unlike the singular focus on dust collisions in the Accretion Theory.</p> Signup and view all the answers

<p>The Capture Theory suggests that tidal interactions between the Sun and a low-density protostar resulted in the Sun drawing material to form the planets.</p> Signup and view all the answers

<p>The Modern Laplacian Theory claims that the Sun and planets formed from a rotating nebula that cooled and collapsed, condensing into rings from which planets were formed.</p> Signup and view all the answers

<p>The Nebular Theory states that the solar system formed from a cloud of gas and dust, with the Sun, planets, and other celestial bodies emerging from a nebula approximately 4.5 billion years ago.</p> Signup and view all the answers

<p>Gravity causes the nebula to condense into regions of varying density, leading to the formation of clumps of matter which eventually create the Sun and planets.</p> Signup and view all the answers

<p>The Capture Theory predicts different ages for the Sun and planets, whereas the similar ages show that they formed at roughly the same time.</p> Signup and view all the answers

<p>The Protoplanet Theory explains that the initial blobs forming planets had higher rotation rates than observed in planets, suggesting they split to form the planets and their satellites.</p> Signup and view all the answers