Sky & Telescope - May 2021 - 41

OBSERVING
May 2021

3 DAWN: Look toward the southsoutheast before sunrise to see the
last-quarter Moon and Saturn about 6°
apart. Jupiter gleams left of the pair.
4 DAWN: The Moon, Jupiter, and
Saturn form a wide triangle above the
southeastern horizon.
6 MORNING: While the Eta
Aquariids are often one of the best
showers for the Southern Hemisphere,
viewers in the southern U.S. may
nevertheless catch some of its meteors
before the waning crescent Moon rises
a little before 4 a.m. local daylight time.
12 DUSK: Scan low in the westnorthwest right after sunset to spot a
thin sliver of lunar crescent less than a
degree from Venus. You'll need a clear
view to the horizon (see page 46 for
more). Binoculars will help.

13 DUSK: A more conspicuous
lunar crescent now sits about 3°
from Mercury. Look toward the westnorthwest to catch the pair before
they set.
15 DUSK: Higher in the west, watch
as the Moon and Mars hang in Gemini
shortly after sunset, with around 2°
between them.

16 DUSK: Find the waxing crescent
Moon, still in Gemini, now some 3°
from Pollux.

17 DUSK: The Moon visits Cancer
and is positioned around 2° from the
Beehive Cluster (M44).
19 DUSK: Look high in the
southwest to see the first-quarter
Moon in Leo, a bit less than 5° from
the Lion's lucida, Regulus.

23 DUSK: As the Moon continues
its passage along the ecliptic, this
evening finds it in Virgo with some 7°
separating it from Spica.
26 DAWN: A total lunar eclipse is
visible for parts of the Americas and
large swaths of the Pacific; turn to
page 48 for details.
26 EVENING: The nearly full Moon
rises in the southeast in tandem with
Antares, the red giant in Scorpius.
They're about 6° apart.
27 DUSK: Look toward the west after
sunset to see Mars and Pollux emerge
from the gloaming as twilight deepens,
and watch as the pair sinks toward the
horizon. Planet and star will be within
6° of one another until early June.
- DIANA HANNIKAINEN

S NASA's Cassini spacecraft took one last look at Saturn and its rings in September 2017, two days before self-destructing in the planet's atmosphere. Turn to page 58 to read more about the astronomer who inspired the naming of the mission. NASA / JPL-CALTECH / SPACE SCIENCE INSTITUTE
s k y a n d t e l e s c o p e . o r g * M AY 2 0 2 1

41



http://www.skyandtelescope.org

Sky & Telescope - May 2021

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Sky & Telescope - May 2021 - 1
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