Astronomy
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Astronomy
Review
Match the features on the left with the shapes on the right to show relative size. The “diamond” shape would be the largest
feature and the “triangle” would represent the smallest feature.
• Galaxy• Solar System• Earth• Universe
How old is the…….
Universe?
How old is the…….
Solar system?
Age of Universe?
• NASA says……..12 – 14 billion years• Wikipedia says……13.75 + or - .11 billion
Age of Solar System?
• NASA says……..4.5 billion years• Wikipedia says……4.6 billion
What’s a Solar System?
• the sun with the celestial bodies that revolve around it in its gravitational field….wordnetweb.princeton.edu/perl/webwn
• The Solar System consists of the Sun and those celestial objects bound to it by gravity, all of which formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago. ...en.wikipedia.org/wiki/Solar_System
Moon PhasesBased on Sun, Moon, & Earth Position
Be able to determine Moon phase based upon the alignmentof the Earth, Moon, and Sun
Moon PhasesAs seen from Earth
Be able to recognize the Moon phases as seen from Earth.
EclipsesBased on Earth, Sun, Moon Location
How do Partial and Total eclipses differ?
Moon Changes in Daily Altitude
Why does the Moon’s altitude change each day?
Moon’s affect on Tides
What’s the relationship between Moon phases and Spring and Neap tides?
Orbital speeds and Gravity
Planets and other objects travel faster when closer (Perihelion) to the Sun and slower when further away (Apehelion) in their orbits.
Reasons for the Seasons
•The Earth is tilted•Parallelism of Earth’s axis•The Earth revolves around the Sun
Foucault Pendulum
Proof that the Earth rotates.
Insolation
INSOLATION =IncomingSolarRadiation
What affects insolation?
Length of Daylight Hours
Length of daylight variesbased on latitude.
Why does the length of daylight vary at different latitudes?
Angle of Insolation
How does the angle of insolation affect temperature?
Changes in Sun Zenith Altitude for Each Season
Why does the Sun’s altitude change throughout the course of a year?
What causes the change in the Sun’s altitude throughout the year?
Star Evolution
Understand that stars can evolve differently.
H-R Diagram
How are H-R diagrams produced?
What do H-R diagrams measure?
Where does the Sun fit into the H-R diagram?
Electromagnetic Spectrum
What’s the source of this energy?
Doppler Effect
Red Shift
Blue Shift
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