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    Articles > August 2021
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Guide to the Night Sky 2021
2021 Guide to the Night Sky

A monthly guide to the night sky in 2021 with star charts, sky calendar, planet data, moon phases, and meteor showers.
More info | Buy now


All sky watchers need a planisphere to quickly show the location of stars and constellations for any date and time. Note: Planispheres are designed for specific latitudes so be sure to select one for your latitude.

Guide to the Stars

(5th Edition, Jan. 2013)
A very large 16-inch diameter information-rich planisphere (plastic) for use anywhere between latitude 30° & 60° North. Also available in a Southern Hemisphere edition.
More info | Buy now

200+ Customer Reviews

More Planispheres

The Night Sky Planisphere

A very popular 8-inch diameter, two-sided planisphere (plastic) designed to depict the night sky with less distortion than regular planispheres. Available for several latitudes, and in a smaller 5-inch edition.
More info | Buy now
• Only $11.95 •

150+ Customer Reviews

Night Sky Editions
Latitude 20° to 30° North
Latitude 30° to 40° North
Latitude 40° to 50° North
Latitude 50° to 60° North
Southern Hemisphere
(more info)

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  Sky Calendar -- August 2021
2 Saturn at opposition (opposite the Sun) at 6h UT. The ringed planet is at its closest and brightest at mag. +0.2. Saturn's rings are spectacular even in a small telescope.
Opposition (Wikipedia)
2 Moon at apogee (farthest from Earth) at 8h UT (distance 404,410 km; angular size 29.5').
2 Moon near the Pleiades (morning sky) at 11h UT.
The Pleiades (Wikipedia)
3 Moon near Aldebaran at 5h UT (morning sky).
Aldebaran (Wikipedia)
6 Moon near Castor at 15h UT (morning sky).
6 Moon near Pollux at 20h UT (morning sky).
8 New Moon at 13:50 UT. Start of lunation 1220.
9 Moon near Regulus at 16h UT (evening sky).
Regulus (Wikipedia)
10 Moon near Mars (evening sky) at 4h UT. Mag. 1.8.
Mars (Wikipedia)
11 Moon near Venus (evening sky) at 11h UT. Mag. −4.0.
Venus (Wikipedia)
12 Perseid meteor shower peaks at 12h UT. Peak lasts about 12 hours. Active from July 17 to August 24. Produces swift, bright meteors (50-100 per hour) many with persistent trains. Best viewed after midnight.
Perseids (Wikipedia)
2021 Meteor Shower Calendar (PDF) (IMO)
13 Moon near Spica at 15h UT (evening sky).
Spica (Wikipedia)
15 First Quarter Moon at 15:20 UT.
16 Moon near Antares at 22h UT (evening sky).
Antares (Wikipedia)
17 Moon at perigee (closest to Earth) at 9:20 UT (distance 369,124 km; angular size 32.4').
19 Mercury 0.08° S of Mars (16° from Sun, evening sky) at 4h UT. Mags. −0.5 and 1.8.
20 Jupiter at opposition at 0h UT. Best time to observe the largest planet in the solar system. Mag. −2.9.
Opposition (Wikipedia)
21 Moon near Saturn (evening sky) at 0h UT. Mag. 0.3.
Saturn (Wikipedia)
22 Moon near Jupiter (midnight sky) at 8h UT. Mag. −2.9.
Jupiter (Wikipedia)
22 Full Moon at 12:01 UT.
29 Moon near the Pleiades (morning sky) at 19h UT.
30 Moon at apogee (farthest from Earth) at 2h UT (distance 404,100 km; angular size 29.6').
30 Last Quarter Moon at 7:14 UT.
30 Moon near Aldebaran at 13h UT (morning sky).
All times Universal Time (UT).
  • US Eastern Daylight Time = UT − 4 hours.
  • US Pacific Daylight Time = UT − 7 hours.
  • Australian Eastern Standard Time = UT + 10 hours
  • Singapore Standard Time = UT + 8 hours.

Clear skies till next month!

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