Our Solar System
Our solar system includes the sun and this many planets.
What is 8?
The sun is made primarily out of these 2 elements.
What are hydrogen & helium?
The universe began 13.8 billion years ago as a hot, dense state called this.
What is singularity?
An object in orbit is called this.
What is a satellite?
These stars have a shorter lifespan because they burn through their fuel faster.
What are large stars?
We live in this galaxy.
What is the Milky Way?
Nuclear fusion takes place in this part of the Sun.
What is the core?
As the universe expands, this is also happening to it's temperature.
What is cooling?
This is the amount of time it takes for Earth to orbit the Sun.
What is 1 year (the Earth's orbital period)?
The hottest stars appear this color.
What is blue?
This is how long it takes for sunlight to reach Earth.
What is 8.3 minutes?
This layer of the sun's atmosphere is only visible during a solar eclipse.
What is the corona?
One piece of evidence for the Big Bang Theory is a faint glow in the form of electromagnetic radiation called this.
What is CMB, Cosmic Microwave Background?
According to Kepler's Laws, the shape of an orbit is called this.
What is an ellipse?
When a star runs out of fuel, it will begin to do this.
This is the distance that light travels in one year.
What is a lightyear?
The sun is found in this area of an HR diagram.
What is the main sequence?
As the universe expands, the light from distant galaxies stretches causing this.
What is Red Shift?
Kepler developed his laws, 50 years before this scientist developed his theory of gravitation.
Who is Newton?
Stars begin as a cloud of gas/dust called this.
What is a nebula?
This is an invisible, noncontact attractive interaction between any 2 objects having mass.
What is Gravity?
These are cooler, darker areas on the sun, with intense magnetic activity.
What are Sunspots?
Are blueshifted stars moving towards you or away from you?
toward
A planet's orbital speed is faster when it is this.
A perfect circle has an eccentricity of this?
What is zero?