Practice Midterm Question- Astronomy – Flashcards
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How did the planets in our solar system form?
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Dust collected
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What is the sun made of?
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Helium and hitrogen
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How are sun spots created?
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twisting of the suns magnetic field
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If solar min happened in 1990 what year will solat max be?
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about 1995 1/2
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Why can't Venus ever be seen in retrograde from Earth?
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Venus is moving faster than Earth is
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What phase will the moon rise in New Moon?
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about 6 am
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What phase of the moon is neap tides?
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first and last quarter because the sun and moon are both pulling on the water canceling the high high tides out
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What phase may experience a lunar eclipse?
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Full moon
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What causes high and low tides on any day?
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the gravitational pull of the moon and the sun
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what astronomical observation determines a planet's day?
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rotation
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If a new planet is discovered inside the asteroid belt, what features would it have?
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Rocky, Small, No rings, Few moons if any
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What is a KBO? (Kuiper Belt Object)
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Short period comets mostly
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What stage of a normal star is the brightest?
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Red Giant
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What color star is the hottest?
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Blue
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What stage will fallow a main sequence star?
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Red Giant
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What causes the Northern Lights?
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ions enter the atmosphere and what we see is them burning up; from solar flairs or CMEs
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What problems can a solar flair cause?
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Blackouts, Eruption of satellite communication, disruption in power grid
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What part of the sun is only seen during a solar eclipse?
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Carona
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What is a reflecting telescope good for?
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further objects, out of solar system
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What stage will our sun end as?
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White Dwarf
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If a star is red shifting, what does this mean?
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Moving away; Red Receding
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Based on current evdance what will happen to the universe in the future?
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space in between local groups will increase, expand forever
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How old is the universe?
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13.7 or 14 billion
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What evidence is there to support the Big Bang, Evidence against it?d
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Support: Most everything is Red Shifting Against: cant create matter from nothing, particles older than supposed Big Bang, things are not evenly space apart, clumpy
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List some instruments that help astronomers study space
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Radio Telescopes, spectroscope (tells compasioion), gamma ray telescope, microwave telescope, cramo graph (planet passing in front of star, can detect change in light change)
