Sample
Summaries after sample
,Sample
Summaries after sample
, Facts about the Milky Way
• Appears as a faint white strip across the sky and is
spiral-shaped.
• 4 main arms – Norma/Outer arm, Crux-Scutum arm,
Carina-Sagittarius arm and Perseus arm.
M12: Beyond • We are located towards the outer edge of the spiral.
• Rotates clockwise.
the solar system • .
•
•
Astronomical units, light years, light
Sample
hours, light minutes and light seconds
• Average distance between the sun and Earth is rounded off
to 150 000 000 km – Astronomical Unit (AU).
• AUs are used to measure distance in the solar system.
• Light year – the distance light travels in a single Earth year.
Summaries after sample
• 1 light year = 10 trillion kilometres.
•
•
Classifying galaxies
• 3 types – spiral, elliptical and barred.
• The Milky Way is spiral – has a central bulge of old
stars surrounded by a disc of younger stars arranged
in spiral arms.
• .
•
•
T4-M12 Spot On Copyright © www.summariessa.co.za (DO NOT COPY)
GR8
NS Mind Map
Summaries after sample
,Sample
Summaries after sample
, Facts about the Milky Way
• Appears as a faint white strip across the sky and is
spiral-shaped.
• 4 main arms – Norma/Outer arm, Crux-Scutum arm,
Carina-Sagittarius arm and Perseus arm.
M12: Beyond • We are located towards the outer edge of the spiral.
• Rotates clockwise.
the solar system • .
•
•
Astronomical units, light years, light
Sample
hours, light minutes and light seconds
• Average distance between the sun and Earth is rounded off
to 150 000 000 km – Astronomical Unit (AU).
• AUs are used to measure distance in the solar system.
• Light year – the distance light travels in a single Earth year.
Summaries after sample
• 1 light year = 10 trillion kilometres.
•
•
Classifying galaxies
• 3 types – spiral, elliptical and barred.
• The Milky Way is spiral – has a central bulge of old
stars surrounded by a disc of younger stars arranged
in spiral arms.
• .
•
•
T4-M12 Spot On Copyright © www.summariessa.co.za (DO NOT COPY)
GR8
NS Mind Map
