AST1002 EXAM 1 EXAMINATION TEST
COMPLETE QUESTIONS AND ANSWERS
FULL SOLUTION VERIFIED
●● When did Astronomy begin to be investigated
Answer: When Galileo invented the telescope in 1609
●● What is the difference between observations or theories
Answer: Theories explain data, and make testable predictions
●● Scientific Method
Answer: An iterative process with observations and theories
(predictions) to explain observed phenomena in the physical world.
More emphasis on concepts and less on facts
●● The Universe (smallest to largest)
Answer: Earth-The Solar System-The milky way-The local group-the
local supercluster
●● How many stars are able to be seen by the naked eye
Answer: 6000
,●● Astronomical Unit
Answer: Mean distance from the sun to the Earth. Around 150,000,000
km or 93,000,000 miles
●● Nearest star from the sun
Answer: 267,800 AU
●● Nearest Large galaxy (andromeda) from the sun
Answer: 200 billion AU
●● Universe Age
Answer: 13.7 billion years
●● Motion
Answer: everything is moving. earth spins like a top 1/2 km/s; earth
orbits the sun 30 km/s, sun orbits the center of the milky way galaxy,
galaxy orbits the local group
●● Constellations
Answer: Chance alignments of stars that are useful for navigation,
calendar, naming locations in the sky, mythology.
●● Celestial Spheres
, Answer: Points of light. Stars appear to rotate around the north celestial
pole
●● Sidereal Day
Answer: 1 actual earth rotation relative to distant ("fixed") stars. 23
hours and 56 minutes
●● Solar Day
Answer: One earth rotation relative to sun. This is longer than a sidereal
day. 24 hours
●● Why are different stars visible at different times
Answer: Bc when we orbit the sun, night which is the side of earth
opposite the sun, occurs facing different directions
●● Summer
Answer: The sun is high in the sky and the days are longer
●● Winter
Answer: The sun is low in the sky and the days are short
●● Summer Solstice
Answer: Sun farthest above equator
COMPLETE QUESTIONS AND ANSWERS
FULL SOLUTION VERIFIED
●● When did Astronomy begin to be investigated
Answer: When Galileo invented the telescope in 1609
●● What is the difference between observations or theories
Answer: Theories explain data, and make testable predictions
●● Scientific Method
Answer: An iterative process with observations and theories
(predictions) to explain observed phenomena in the physical world.
More emphasis on concepts and less on facts
●● The Universe (smallest to largest)
Answer: Earth-The Solar System-The milky way-The local group-the
local supercluster
●● How many stars are able to be seen by the naked eye
Answer: 6000
,●● Astronomical Unit
Answer: Mean distance from the sun to the Earth. Around 150,000,000
km or 93,000,000 miles
●● Nearest star from the sun
Answer: 267,800 AU
●● Nearest Large galaxy (andromeda) from the sun
Answer: 200 billion AU
●● Universe Age
Answer: 13.7 billion years
●● Motion
Answer: everything is moving. earth spins like a top 1/2 km/s; earth
orbits the sun 30 km/s, sun orbits the center of the milky way galaxy,
galaxy orbits the local group
●● Constellations
Answer: Chance alignments of stars that are useful for navigation,
calendar, naming locations in the sky, mythology.
●● Celestial Spheres
, Answer: Points of light. Stars appear to rotate around the north celestial
pole
●● Sidereal Day
Answer: 1 actual earth rotation relative to distant ("fixed") stars. 23
hours and 56 minutes
●● Solar Day
Answer: One earth rotation relative to sun. This is longer than a sidereal
day. 24 hours
●● Why are different stars visible at different times
Answer: Bc when we orbit the sun, night which is the side of earth
opposite the sun, occurs facing different directions
●● Summer
Answer: The sun is high in the sky and the days are longer
●● Winter
Answer: The sun is low in the sky and the days are short
●● Summer Solstice
Answer: Sun farthest above equator
