Chapter 0 Charting the Heavens© 2017 Pearson Education, Inc... 0.1 The “Obvious” Viewdon’t occupy any special place in the universe space, time, matter, and the distance light travels in
Trang 2Chapter 0 Charting the Heavens
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Trang 3Units of Chapter 0
Trang 40.1 The “Obvious” View
don’t occupy any special
place in the universe
space, time, matter, and
the distance light travels
in a year—about 10 trillion miles
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Trang 50.1 The “Obvious” View
Trang 60.1 The “Obvious” View
– Stars seem to be on the inner surface of
a sphere surrounding the Earth.
– They aren’t, but we can use
two-dimensional spherical coordinates (similar to latitude and longitude) to locate sky objects.
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Trang 7More Precisely 0.1: Angular Measure
seconds)
actual size and distance away from Earth
Trang 80.1 The “Obvious” View
Sun at vernal equinox
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Trang 90.2 Earth’s Orbital Motion
motion—solar day
hours later, though, due to Earth’s rotation around the Sun; when they are in the
same place again, one sidereal day has passed
Trang 100.2 Earth’s Orbital Motion
path is ecliptic
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Trang 110.2 Earth’s Orbital Motion
path around the Sun, at
solstice; points where
path crosses celestial equator are vernal and autumnal quinoxes
Trang 120.2 Earth’s Orbital Motion
years
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Trang 130.2 Earth’s Orbital Motion
and August will still be summer, but Orion will be a summer constellation
Trang 140.3 The Motion of the Moon
being visible from Earth
sidereal month, is about 2 days shorter than synodic month
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Trang 150.3 The Motion of the Moon
– Earth is between the Moon and Sun.
– A partial eclipse occurs when only part of the Moon is in shadow.– A total eclipse occurs when all is in shadow.
Trang 160.3 The Motion of the Moon
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Trang 170.3 The Motion of the Moon
and annular when the Moon is too far from Earth for total
Trang 180.3 The Motion of the Moon
same plane
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Trang 190.3 The Motion of the Moon
Trang 200.4 The Measurement of Distance
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Trang 210.4 The Measurement of Distance
at apparent motion of object against distant background from two vantage points
Trang 220.5 Science and the Scientific Method
Trang 230.5 Science and the Scientific Method
phenomena are
observed If the
observations agree
with the prediction,
more predictions can
be made If not, a new
theory can be made
Trang 24Summary of Chapter 0
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Trang 25Summary of Chapter 0, cont.
not in same plane