Stars
The state of matter of the sun and stars
What is plasma?
The distance between two peaks of a wave
What is wavelength?
Electromagnetic radiation carries energy and information.
True
This is your favorite scientist from this series
Who is....
Distances in space outside of our solar system are measured in ...
Light years
What is the universe?
What is light?
A light-year measures the speed light travels in a year in the vacuum of space.
False - correct answer is distance (not speed).
The founder of Modern Cosmology.
Who is Edwin Hubble?
This 'unit' measures the distance between Earth and the sun.
1 AU (Astronomical unit)
H and He
What are hydrogen and helium?
The shift to longer wavelengths when the source is moving away from the observer.
What is Redshift?
Gamma rays are on the blue end of the electromagnetic spectrum. That tells you they have a long wavelength.
Edwin Hubble formulated his law in 1929. In 1917, another scientist produced a model showing that the universe was expanding (Hubble's Law). The scientist did not believe in his own model and did not publish his work.
Who is Albert Einstein?
Visible light is part of what spectrum?
The electromagnetic spectrum.
On the HR diagram, most stars, including our sun, are in this sequence, because their cores are stable.
What is the main sequence?
when nuclei join together to form a heavier nucleus
Stars emit light because of nuclear fusion reactions.
True.
In 1983, this scientist proposed a theory about the boundaries of the universe, stating that the universe has no boundaries.
Who is Stephen Hawkings?
The milky way galaxy is how many light years across?
100,000
These stars are in the upper right hand corner of the HR diagram because they are bright and cool.
What are the Red Giants
What is the Doppler effect?
There are three states of matter: solid, liquid, and gas.
False. Four states of matter; plasma.
Huggins was the first person to identify this shift of light from some stars.
What is the Doppler shift?
What type of matter does not give off or reflect electromagnetic radiation and is observed through its gravitational effects.
Dark matter.