What is the estimated time since the Big Bang occurred?
Astronomy Midterm Review

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•
Science
•
6th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Approximately 13.7 billion years ago.
2.
FLASHCARD QUESTION
Front
What is the tilt of the Earth's axis in degrees?
Back
23.5 degrees.
3.
FLASHCARD QUESTION
Front
What is the longest day of the year called?
Back
Summer solstice.
4.
FLASHCARD QUESTION
Front
Which category contains the most stars?
Back
Main Sequence.
5.
FLASHCARD QUESTION
Front
What happens to galaxies in our expanding universe?
Back
Galaxies appear to move away due to the expansion of space itself.
6.
FLASHCARD QUESTION
Front
What is the term for the phenomenon where light from distant galaxies shifts to longer wavelengths?
Back
Redshift.
7.
FLASHCARD QUESTION
Front
What is the center of our solar system?
Back
The Sun.
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