The Night Sky. What are constellations? Why do we see some in winter, some in summer and some all year long? Why do they move? How are they useful?. Our Place in Space. Earth does not occupy any special place in the Universe The Universe:
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What are constellations?
Why do we see some in winter, some in summer and some all year long?
Why do they move?
How are they useful?
It is all of space and everything in it… including time.
The most simplest observation in Astronomy: Look at the night sky
About 3000 stars visible at any one time; distributed randomly but human brain tends to find patterns…
These patterns are constellations
Group stars into constellations: figures having meaning to those doing the grouping
Useful: Polaris, which is almost due north
Not so useful: Astrology, which makes predictions about individuals based on the star patterns at their birth
1.3 The “Obvious” View and some all year long?
Stars that appear close in the sky may not actually be close in space:
the North Star