Astronomy Exam 2

The Principle of Occans Razor states that...
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The Principle of Occans Razor states that...
In explaining natural phenomena, the simplest explanation consistent with the observations is to be preferred.
NOT an advantage of the Hubble Space Telescope compared to a ground telescope:
it is closer to the stars
On the scale of the cosmic calendar, in which the history of the universe is compressed to one year, how long have humans existed?
A few seconds
Why are different stars seen in different seasons?
As the earth orbits the sun, the sun covers different constellations.
Most of the material that makes up Earth and life on Earth including humans was forced:
Inside stars that died before Earth formed
The total number of stars in the observable universe is about:
the same amount of grains of sand on all beaches on Earth
What do Astronomers mean by light pollution?
The light from humans that make it hard to see the stars at night.
The stars in our sky twinkle and jitter around because:
Turbulence in Earth's atmosphere
The size of the moon is about the same size as:
The United States
Where is our solar system located within the Milky Way?
About half way between the center and the edge of the visible disk of the galaxy.
During the entire solar eclipse, you areIn the shadow of the moonWhat is the purpose of adaptive optics?It reduces blurring caused by atmospheric turbulence for telescopes on the ground.How far away is outer space?From Eugene to salem, 62 milesAstronomers now classify Pluto as a large member of the:Kuiper BeltA broad idea that has been repeatedly verified to give scientists confidence that it represents reality is called:A theoryT or F: One part of being a science literate means that you can read and understand articles in a science magazine.TrueT or F: Adaptive Optics helps astronomer's observe when it's cloudyFalseT of F: The earth is closer to the sun when it's sunny in EugeneFalseT of F: Gemini North is a refracting telescopeFalseT of F: In a dark sky you can see about 25,000 stars with the naked eyeFalseT or F: The latitude of where you are, determines which constellations you can seeTrueT or F: Wifi signals are a form of lightTrueT or F: Making a prediction is a fundamental part of the scientific method.TrueT or F: The observable universe is the same size today as is was a few billion years ago.FalseT or F: The backside of the moon is always darkFalseT or F: The atoms that make up your body were created inside starsTrueDr. Fisher wants you to buy your own telescopeFalseT or F: A total lunar eclipse happened in Oregon on August 21 2017False (it was a solar eclipse)T or F: We have discovered exoplanets that have liquid water on their surfaceTrueT or F: There is currently a spacecraft in orbit around SaturnFalseEverything you know about the Grapefruit scale:The grapefruit scale is what allows us to grasp onto the scale of our planet and other objects in the universe better. The sun is a grapefruit as the earth is the tip of a ballpoint pen about 50 feet away. The closest star is the distance from us in Oregon to Washington DC.3 Hallmarks of science:1. Seeking advancements in modern science 2. Making testable predictions 3. Either revising predictions or throwing them away if they're inaccurate Similar to the scientific method