Astronomy - USA (2020-01)

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HOW TO USE THIS MAP

This map portrays the sky as seen

near 30° south latitude. Located

inside the border are the cardinal

directions and their intermediate

points. To find stars, hold the map

overhead and orient it so one of

the labels matches the direction

you’re facing. The stars above

the map’s horizon now match

what’s in the sky.

The all-sky map shows

how the sky looks at:

10 P.M. March 1

9 P.M. March 15

8 P.M. March 31

Planets are shown

at midmonth

MAP SYMBOLS

Open cluster

Globular cluster

Diffuse nebula

Planetary nebula

Galaxy

STAR

MAGNITUDES

Sirius

0.0

1.0

2.0

3.0

4.0

5.0

STAR COLORS

A star’s color depends

on its surface temperature.

-^ The hottest stars shine blue

• Slightly cooler stars appear white


• Intermediate stars (like the Sun) glow yellow


• Lower-temperature stars appear orange


• The coolest stars glow red


• Fainter stars can’t excite our eyes’ color
  receptors, so they appear white unless you
  use optical aid to gather more light

STAR DOME

BEGINNERS: WATCH A VIDEO ABOUT HOW TO READ A STAR CHART AT

http://www.Astronomy.com/starchart.