P7 - Observing the Universes

Covers Unit 2 of OCR 21st Century Science's P7 module.

Includes:

- Solar/Sidereal Days

- Solar/Lunar Eclipses

- Phases of the Moon

- Parallax angles

- Retrograde Motion

- Red Shift

- Lifecycle of Stars

- The Curtis-Shapely Debate

- Cepheid Variables

- Hubble Constant

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  • Created by: Sinead
  • Created on: 28-05-12 16:10
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SIDEREAL DAY
· Measured with respect to the apparent movement of `fixed' stars in the sky
· These movements are due to the Earth's rotation on its axis
· Sidereal time is the measured amount of time taken for the Earth to rotate ONCE
with respect to a specific star
· A SIDEREAL DAY is 23 hours 56 minutes long…read more

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SIDEREAL DAYS
The Earth's orbit of
the Sun
The Earth rotates Light from a distant star appears
360° on its axis directly above the Earth…read more

Slide 4

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SIDEREAL DAYS
The Earth's orbit of
the Sun
The Earth rotates
360° on its axis…read more

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SIDEREAL DAYS
The Earth's orbit of
the Sun
After the Earth has rotated 180° on its axis it
faces towards the Sun, the star is no longer
visible (day time)…read more

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SIDEREAL DAYS
The Earth's orbit of
the Sun…read more

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