How Scientists Study Space
This wavelength has the lowest energy and the longest wavelength
Radio
Protons, neutrons, and electrons formed
This determines the path a star will take
its mass
What is the first step in the SNCT?
Nebula
In an ellipse
This type of energy is produced through heat
Infrared
An object moving away from us appears red-shifted. What does an object moving towards us appear as?
White Dwarf
What caused the gas and dust to clump together?
Gravity
The higher the eccentricity the more _________ the orbit.
elliptical
This type of wavelength allowed us to map the spiral arms of the Milky Way
Radio
Why can't the amount of helium in the universe be explained by stellar fusion alone?
The amounts seen in the universe are far larger than what can be produced by stellar fusion
Supernova
How is a planetesimal different from a protoplanet?
Planetismals are smaller than protoplanets
At what point in its orbit does Earth move the slowest?
aphelion (farthest from Earth)
This wavelength allows us to see remnants of supernovae and black holes
X-Ray
What is CMBR?
Residual heat seen throughout the universe
What is the visual difference between an absorption and emission spectrum?
Absorption: black lines against a rainbow background
Emission: colorful lines against a black background
What is the difference between accretion and condensation?
Condensation is a gas forming into a solid
Accretion is the gradual increase in size of the solid
A planet has a semi-major axis (a) of 3 AU. What is its orbital period (T) in Earth years?
Use this formula: T^2 = a^3
T^2 = 3^3
T^2 = 27
T = 5.2 years
The Earth's atmosphere (ozone) blocks UV radiation
What does Hubble's law explain about the rate of the universe's expansion?
The farther the galaxies, the faster they are moving.
What does the HR diagram measure?
Luminosity and temperature of stars
How can meteorites be made of the same elements as Earth?
They came from the same nebula
A planet has an orbital period of 8 years. What is the semi-major axis (a)?
Use this formula: T^2 = a^3
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