The edge
The Sun's bubble and the Oort cloud
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0 right here
Your motion through space, the stardust you are made of, and what passes through you every second.
1.3 light-seconds
The thin shell of near space: the people living up there, everything in orbit, and what falls in.
8.3 light-minutes
Our star and its weather, the planets, the rocks we watch, and the craft we sent out.
4.2 light-years
The nearest stars, the light in your sky, and the birth and death of stars everywhere.
26,000 light-years
Our galaxy: its hundreds of billions of stars, the black hole at its heart, and our long orbit around it.
2.5 million light-years
Andromeda falling toward us, the trillions beyond, and the most violent events in nature.
46.5 billion light-years
Its age, its growth, what it is made of, how it began and how it may end.
The Sun's bubble and the Oort cloud
0 subjects
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