Gravity in the Solar System
A force of attraction between objects that is due to their masses and distances from one another.
What is Gravity?
A model of the solar system with the sun at the center.
What is heliocentric?
A small body from which a planet forms.
What is a planetisimal?
Celestial bodies made up of gas that give off light.
What are stars?
A main sequence, medium-sized star.
What is our sun?
Gravitational pull increases as objects increase in mass and decrease in distance.
What is Newton's Law of Universal Gravitation?
What is perihelion?
This stage came first in the formation of the solar system.
What is a solar nebula.
The distance that light can travel in one year
What is a light-year?
The most common element in our sun.
What is hydrogen?
Gravity caused the solar nebula to collapse toward the center, causing the center to be dense and hot.
What is the formation of the sun?
He first stated that the sun and planets move in circular orbits with Earth at the center.
Who is Aristotle?
These planets contain thick atmospheres of gases and ice because the planets are far enough from the sun that these materials could condense.
What are gas giants?
The distance of a light-year.
What is 9.5 trillion kilometers?
The innermost layer of the sun.
What is the core?
This force is responsible for holding the stars, planets, gas, and dust together in a galaxy.
What is gravity?
He supported Aristotle's geocentric model of the solar system, and his model was used for thousands of years.
Who is Ptolemy?
These formed most recently in our solar system.
What are planets?
The order of star color from coolest to hottest.
What is red, yellow, white, blue?
The primary atomic reaction that takes place within the sun and converts hydrogen atoms into helium atoms.
What is nuclear fusion?
This scientific law states the orbit of a planet or other body around the sun is an ellipse, and the sun is one focus of the ellipse.
What is Kepler's First Law of Planetary Motion?
He proposed that planets orbit the sun in circular orbits.
Who is Copernicus?
One of the elements found on Mars is iron. This feature of Mars is a result of iron combining with oxygen in the atmosphere of Mars.
What is Mars' red color?
This object has a massive gravitational pull, so much so that not even light can escape it. It can form when a massive star dies and collapses.
What is a black hole?
In one layer of the sun, hot gases rise through cooler gases as they travel to the top of the layer. The hot gases then cool and sink back down to become heated again. This process takes place in this layer of the sun.
What is the convective zone?