Midterm Topics Flashcards
Who proposed Oscillating Theory?
Richard Tolman
Who proposed BigBang Theory?
Georges Lemaitre
A dense intersellar cloud produces a clusters of stars. Dense regions in the cloud forms and coalesce, as the small blobs have random spins.
Protoplanet Hypothesis
A star passes close enough to the sun creating huge tides and causing materials to be ejected. It suggested that when a huge tidal wave created from a sun’s collision with another star, a long filament was drawn out and detached from the principal mass.
Planetesimal and Tidal Theories
The whole solar system starts as a large cloud of gas that contracts under self-gravity.
Nebular Hypothesis
This theory sees our universe as just one of many “bubbles” that grew apart.
Multiverse Theory
A theory that proposes a period of extremely rapid (exponential) expansion of the universe during its first few moments.
Inflation Theory
Universe is always expanding but maintaining a constant average density, with matter of being continuously created from new stars and galaxies.
Steady State Theory
Cosmological model that combines both the BigBang and the big crunch as part of cyclical event.
Oscillating Theory
The universe is expanding, having originated from infinity tiny, infinitely dense point around 14 Billion years ago.
Multiverse Theory
Who proposed Steady State Theory?
Fred Hoyle, Thomas Gold, and Herman Bondi
Who proposed Inflation Theory?
Alan Guth
Who proposed Multiverse Theory?
Hugh EVerett III and Bryce De Witt
Who proposed Nebular Hypothesis?
Immanuel Kent and Pierre Simon Laplace
Who proposed Planetesimal Theory?
Thomas Chamberlin and Forest Ray Moultan
Who proposed Tidal Theory?
James Hopwood Jeans and Harold Jeffreys
Who proposed Protoplanet Hypothesis?
Gerald Kuiper and Carl von Weizsacker
The solar system is comfortably nestled in a safe harbor major spiral arms, and its nearly circular orbit help it avoid the galaxy’s perilous inner region.
Location
Stars move massive than this burn hotter and usually don’t love long enough for planets to develop life.
Sun
Earth orbits in the so called GOLDILOCKS zone, where the planet receives enough energy to allow water to exist as a liquid on its surface.
Right Location
The intersellar cloud of gas and dust that gave rise to earth contained enough radioactive elments to power a charming core for billions of years.
Dynamic Core
Earth is tilted with respect to the sun and teeters as it spins the tiny wooble can shift the climate from hot to icy.
Big Moon
A zone within the earth where a sudden change in physical properties, such as the velocity.
Discontinuity
Between the upper & lower crust.
Conrad Discontinuity
