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SHAPES OF GALAXIES. ALL THE SHAPES, SIZES AND FACTS OF GALAXIES! BY HELSBY HIGH SCHOOL. INTRODUCTION - BETH. GALAXIES = STARS (MILLIONS AND BILLIONS) PLANETS DARK MATTER. DIFFERENT TYPES OF GALAXIES INCLUDING : SPIRAL ELLIPTICAL IRREGULAR LENTICULAR.

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SHAPES OF GALAXIES

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SHAPES OF GALAXIES

ALL THE SHAPES, SIZES AND FACTS OF GALAXIES!

BY HELSBY HIGH SCHOOL


INTRODUCTION - BETH

GALAXIES = STARS (MILLIONS AND BILLIONS)

PLANETS

DARK MATTER.

DIFFERENT TYPES OF GALAXIES INCLUDING :

SPIRAL

ELLIPTICAL

IRREGULAR

LENTICULAR


SPIRAL GALAXIES – SARITA

  • Spiral galaxies are rich in gas and dust

  • The spiral structure is associated with active star-forming regions.

  • Disked shaped with spirals

  • Often have bright bulges in the centre

  • Contain interstellar gas, nebulae, star forming regions, open clusters and globular clusters


IRREGULAR GALAXIES – JAY

  • Irregular galaxies – IRREGULAR!

  • Ellipse or Spiral???????

  • All Irregular galaxies are different!

  • How can you tell if it’s Irregular or not then?

  • Are they symmetrical?

  • How are they formed?

  • Are Irregular galaxies mistaken?

  • What are those blobs?

  • What are different ones called?


ELLIPTICAL GALAXIES - ALASTAIR

  • Elliptical galaxies are epsoidal in shape.

  • They contain no spiral arms.

  • They have very little interstellar gas or dust.

  • They are often found in rich clusters of galaxies.

  • They appear to be yellow-red unlike spiral galaxies which appear blue.

  • Elliptical galaxies contain a similar amount of stars to spiral galaxies.

  • They are known for their old, red stars.

  • In general the centres of these galaxies emit high amounts of blue ultraviolet light.


CARTWHEEL GALAXIES - NATHAN

  • How are they formed?

  • Head on collusion

  • How fast do they expand?

  • 200,000mph

  • What are the blue dots?

  • Lots of unborn stars


HUBBLE SEQUENCE -REID

  • The Hubble “Tuning Fork” diagram starts from the left.

  • Developed by Edwin Hubble in 1936.

  • Classification of galaxies.


DARK MATTER - TOM

  • Most matter is dark

  • Can’t be detected

  • Can’t be seen directly

  • Indirectly from movements of astronomical objects

  • Needed by gravity

  • Large scale structures


CONCLUSION - WILL

These are mainly the only galaxies we know of. For all we know there may be many more!

There are millions of galaxies and lots of ways of interpreting them!

Thank you for listening. I hope you learnt something and we hope you enjoyed it.

Just Imagine What Might Be Out There?


Do You Have Any Questions?


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