Objective 03/26/12
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Objective 03/26/12. Identify the units of a calendar. Intro. How do scientists study space?. Astronomy History. Astronomy History. Astronomy. The study of the universe. Astronomy History. Calendar Year . Based on the observation of objects in our solar system

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Intro

Objective 03/26/12

Identify the units of a calendar.

Intro

How do scientists study space?


Astronomy history

Astronomy History


Astronomy history1

Astronomy History

  • Astronomy

  • The study of the universe


Astronomy history2

Astronomy History

  • Calendar

  • Year

  • Based on the observation of objects in our solar system

  • Time required for Earth to orbit once around the sun

    • 365.25 days


Astronomy history3

Astronomy History

  • Month

  • Day

  • Amount of time required for the moon to orbit once around Earth

    • ~ 28 days

  • Time required for Earth to spin once on its axis

    • 24 hours


Astronomy history4

Astronomy History

  • Rotation (rotate)

  • Revolution (revolve or orbit)

  • Spin on an axis

  • Go around an object


Astronomy history5

Astronomy History

  • Early Astronomers

  • Could only observe the universe with their eyes and minds

  • Thought universe had only Sun, Moon, and planets, with stars at the edge of universe


Astronomy history6

Astronomy History

  • Ptolemy

  • 140 C.E.

  • Greek Astronomer

  • Geocentric

    • Earth at center of universe

  • This theory lasted 1,500 years!


American history

American History

  • Copernicus

  • 1543

  • Polish Astronomer

  • Heliocentric

    • Sun is the center of the universe


Astronomy history7

Astronomy History

  • Tycho Brahe

  • Late-1500s

  • Danish Astronomer

  • Invented several large tools to study the universe and took many precise measurements and data

  • Believed in different geocentric universe


Astronomy history8

Astronomy History

  • Johannes Kepler

  • 1609

  • Brahe’s assistant

  • Used Brahe’s data to prove heliocentric universe AND planets orbit in elliptical orbit

  • Developed the 3 laws of planetary motion which are still used today


Astronomy history9

Astronomy History

  • Galileo Galilei

  • 1609

  • First person to use a telescope to observe object’s in space

  • Discovered:

    • Moon has craters and mountains

    • Four of Jupiter’s moons

    • Sunspots on the Sun


Astronomy history10

Astronomy History

  • Isaac Newton

  • 1687

  • Discovered the law of gravity

    • All objects in the universe are attracted to each other

  • Explains the orbits of planets around the Sun


Astronomy history11

Astronomy History

  • Edwin Hubble

  • 1924

  • Proved other galaxies existed beyond our galaxy

  • The universe is much MUCH bigger than previously thought


Astronomy a history

Astronomy: A history


Intro

Objective 03/26/2012

Identify the units of a calendar.

Outro

How can you study space?


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