Astr 1010 Study guides, Class notes & Summaries

If the Sun suddenly exploded, how soon after the explosion would we know about it? correct answers a little more than 8 minutes If a star exploded in the Andromeda Galaxy, how long would it take that information to reach Earth? correct answers 2.5 million years Explain how the word theory is used differently in the context of science than in common everyday language. correct answers -in common language, theory is a type of guess about how things work that is not based on facts or observati...

8 minutes correct answers HW Question: If the Sun suddenly exploded, how soon after the explosion would we know about it? two million years correct answers HW Question: If a star exploded in the Andromeda Galaxy, how long would it take that information to reach Earth? In everyday language, a theory is a guess about how something works. In science, a theory is a well-developed and tested idea about how nature works. correct answers HW Question: Explain how the word theory is used d...

Why is the sky blue? correct answers the air scatters blue light from the Sun What color is the sky on the Moon or the planet Mercury, where there is no air at all? correct answers black Why do the Sun and Moon look redder when they are closer to the horizon (that is, "why are sunsets red")? correct answers their light is passing through more air, so all the colors except for orange and red are scattered away from the direct line of sight to the Sun (or Moon) Why aren't the stars up ...

The Andromeda Galaxy is faintly visible to the naked eye. When you look at the Andromeda Galaxy, the retina of your eye is absorbing light that has traveled through space for ______ to reach you. correct answers about 2 ½ million years Suppose that someone in the Andromeda galaxy had a super-telescope through which they were looking at Earth right now. They would see Earth ______. correct answers as it was about 2 ½ million years ago The key discovery that led to the idea of the Big Bang...

15 days correct answers If a solar eclipse occurs today, when might you have a chance to see a lunar eclipse? at the southern horizon correct answers If you are at the Earth's equator, where is the south celestial pole? 39 degrees correct answers If you are at a latitude of 39 degrees north, what is the altitude of the north celestial pole with respect to the northern horizon? New correct answers For a solar eclipse to occur what phase must the moon have? 26,000 years correct answer...

A _____ is a new idea that can be tested by experimentation and evidence; the more experiments and evidence which agree with the idea, the more confidence we have that this idea is a good description of the natural world. If any piece of evidence or experimental result disagrees with the idea, the idea needs to be adapted or perhaps completely rejected. correct answers Hypothesis True or false: Current evidence suggests that the scientific laws that have been studied and developed here on Ear...

Total eclipses of both kinds are rare, but is one kind more visible than the other correct answers more people can see a total lunar eclipse What causes the "backwards" motion of planets relative to the stars ("retrograde motion") in the heliocentric model correct answers planets closer to the sun orbit fast In Boulder on the winter solstice the Sun will rise in the ____ and set in the __ correct answers southeast, southwest Your daughter the astronaut calls you from the Moon one da...

ASTR 1010 / Astronomy 1010 Final HW Complete Questions & Answers. One of the most important earlier steps in understanding stars was to group them into classes called spectral types that could offer clues as to why they are different from one another. Shown here are spectra of some main-sequence stars. Before stars were very well understood, they were classified into an order that was based on the relative strength of hydrogen absorption lines, marked by arrows the image shown. Look at the...

ASTR 1010 / Astronomy 1010 Final HW Complete Questions & Answers. One of the most important earlier steps in understanding stars was to group them into classes called spectral types that could offer clues as to why they are different from one another. Shown here are spectra of some main-sequence stars. Before stars were very well understood, they were classified into an order that was based on the relative strength of hydrogen absorption lines, marked by arrows the image shown. Look at the...

15 days correct answers If a solar eclipse occurs today, when might you have a chance to see a lunar eclipse? at the southern horizon correct answers If you are at the Earth's equator, where is the south celestial pole? 39 degrees correct answers If you are at a latitude of 39 degrees north, what is the altitude of the north celestial pole with respect to the northern horizon? New correct answers For a solar eclipse to occur what phase must the moon have? 26,000 years correct answer...