Astronomy

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