What the Sun does
What process powers the Sun?
Nuclear Fusion
Stellar Nebula
What do we call patterns of lines in a spectrum?
Spectral Lines
What is the Big Bang Theory?
The idea that the universe began from an extremely dense, hot state.
What happens to light waves when an object moves away?
The wavelength increases, shifting towards the red.
What two elements fuse in the Sun's core?
Hydrogen and Helium
What are the two forces which balance a stable star?
gravity pushing inward
fusion power pushing outward
In which part of the Electromagnetic Spectrum do we find spectral lines?
Visible Spectrum
About how long ago did the Big Bang occur?
Around 13.8 billion years ago.
What does redshift indicate about a galaxy?
It’s moving away from us.
****Double Value****
How are Solar Flares and Sun Spots related? How long is the cycle?
Both are caused by the Sun's magnetic field, with flares often originating from the active regions surrounding the sun spots. They are on an 11-year cycle
What happens to Massive stars when fusion stops? What do they become afterwards?
****Double Value****
What is the relationship between wavelength and energy?
Longer wavelength = lower energy
What evidence supports the Big Bang?
Cosmic background radiation and redshift.
Why is redshift important to astronomers?
Redshift supports the claim that the universe is expanding
In which part of the Sun does fusion occur?
The core
What is the Sun's current stage?
Main sequence star
Which color in the visible spectrum has the longest wavelength?
red
What does cosmic background radiation represent?
Energy left over from the Big Bang.
****Double Points****
What type of data is needed to measure redshift?
A star’s spectrum.
Which has a longer life, massive stars or smaller/average sized stars.
At the end of its life, what will our Sun become
White Dwarf
What do absorption lines tell us?
Which elements are present in a star’s atmosphere.
What happens to galaxies over time according to the Big Bang model?
They move farther apart.
Two objects show red shift, but one shows more red shift that the other. What does this tell you about this object?
The object with more red shift is moving at a faster speed.