Term
| Why do we only see the Milky Way as a flat band across the sky? |
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Definition
| Because we (Earth) are inside of it. |
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Term
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Definition
A group, of 30 or so galaxies including the Milky Way. |
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Term
| What is supposed to be at the centre of the Milky Way? |
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Definition
At its centre is believed to be a supermassive black hole called Sagittarius A which is a source of immense radiation which we can detect. |
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Term
| What type of galaxy is the Milky Way? |
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Definition
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Term
| How do astronomers study the Rotation of our Galaxy? |
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Definition
By using radio waves because we can only see part of the sky with visible light. |
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Term
| How many light years is our Sun from the centre of The Milky Way? |
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Definition
The Sun is around 30,000 light years from the centre of the Milky Way. This is about two-thirds of the way from the centre, along one of the spiral arms. |
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Term
| What Spiral Arm is our Sun positioned on? |
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Definition
The Sun is positioned on a spiral arm called the Orion Arm. |
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Term
| How many years is a Glactic Orbit? |
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Definition
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