Rules
How many notes can you bring?
Two sheets of paper
What is a planet?
A celestial body moving in an elliptical orbit around a star.
What is planet decay?
The gradual, long-term reduction of a planet's or satellite's orbital altitude, causing it to move closer to its host body.
What would happen if the moon dissapeared?
Earth would experience chaotic, long-term environmental disasters.
What is a displacement law you have to study
Wien's Displacement Law.
What is a star?
A fixed luminous point in the night sky, which is a large, remote incandescent body like the sun.
What is planet formation?
The complex, multi-stage process where dust and gas within a protoplanetary disk surrounding a young star collide, coalesce, and accumulate through gravity to form solid bodies.
What would happen if the star exploded? (What if a supernova happened?).
Either it would become a black hole or a nebula.
What diagram is used in this event?
The H-R Diagram.
What is a nebula?
A cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.
What is disk instability?
A theoretical model of gas giant planet formation where a massive, cold, outer protoplanetary disk becomes gravitationally unstable, rapidly fragmenting into dense, self-gravitating clumps
Gravitational force.
What planets do you have to study?
Mercury, Jupiter, Saturn, Uranus, Neptune, and Pluto.
What is a planetesimal?
A minute planet; a body that could or did come together with many others under gravitation to form a planet.
What is core accretion?
The leading model for planet formation, where solid dust and rock in a protoplanetary disk collide and stick together to form a, say, 10–20 Earth-mass core.
What would happen if the Earth's rotation was backwards?
There wouldn't be much effect; however, climate and ecology would be significantly different.
How many extrasolar systems must you study?
4 systems.
What is a protostar?
A contracting mass of gas which represents an early stage in the formation of a star, before nucleosynthesis has begun.
What is radial velocity?
The component of an object's velocity directed toward or away from an observer along the line of sight.
Which is more popularized, core accretion or disk instability?
Core accretion.