New Moons and Full Moons, Eclipses and Mercury Retrogrades 2021
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February 11: Venus-Jupiter Conjunction
Venus and Jupiter will both appear as brilliant dots and will be very close in the sky and visible through a backyard telescope. The perfect time to see them will be about 20 to 30 minutes before sunrise.
March 9 and 10: Quadruple formation
The great opportunity to observe a cosmic huddle around the globe. Mercury, Jupiter, and Saturn will all appear to form an alignment, while the nearby crescent moon will frame the trio of planets. Mercury will be the faintest and Jupiter the brightest, and all easily visible to the naked eye.
On May 26: “Blood moon”, A Total Lunar Eclipse
The moon will undergo a total lunar eclipse and will turn reddish for 15 minutes. Those who live in western North America, western South America, Australia, and Southeast Asia will be able to witness this event.
June 10: “Ring of fire” solar eclipse
An annular, or "ring of fire," solar eclipse will occur in Canada, Greenland, and Russia. This awesome event occurs when the Earth, sun, and moon are aligned and the lunar disk is too small to cover the entire sun.
August 11 to 12: Perseid Meteor Shower
Perseids are one of the brighter meteor showers of the year and will fall on warm summer nights. It doesn’t require any special equipment to view a meteor shower. All you need is a clear sky and lots of patience.
November 19: Partial Lunar Eclipse
The Moon will be covered by the Earth's shadow in a deep partial eclipse that will last 3 hours and 28 minutes. This event is visible in east Asia, Australia, the Pacific, and the Americas.
December 13 to 14: Geminid Meteor Shower
You don’t want to miss this one of the most beautiful celestial events of the year, the Geminids is the strongest meteor shower happening this year as there will be as many as 150 meteors that will illuminate the night sky.
New Moons
Jan. 13, Wed
Feb. 12, Fri
Mar. 13, Sat
Apr. 12, Mon
May 12, Wed
June 10, Thu
July 10, Sat
Aug. 8, Sun
Sept. 7, Tue
Oct. 6, Wed
Nov. 5, Fri
Dec. 4, Sat
Full Moons
Jan. 29, Fri
Feb. 27, Sat
Mar. 29, Mon
Apr. 27, Tue
May 26, Wed
June 25, Fri
July 24, Sat
Aug. 22, Sun
Sept. 21, Tue
Oct. 20, Wed
Nov. 19, Fri
Dec. 19, Sun
Eclipse calendar for 2021
May 26: Sagittarius (Total Lunar Eclipse)
June 10: Gemini (Annular Solar Eclipse)
November 19: Taurus (Partial Lunar Eclipse)
December 4: Sagittarius (Total Solar Eclipse)
Retrograde calendar for 2021
January 30–February 20: Mercury in Aquarius
May 29–June 22: Mercury in Gemini
September 27–October 18: Mercury in Libra
December 19, 2021–January 29, 2022: Venus in Capricorn
June 20–July 28: Jupiter in Pisces
July 28–October 18: Jupiter in Aquarius
May 23–October 10: Saturn in Aquarius
January 1–14: Uranus in Taurus
August 19, 2021–January 18, 2022: Uranus in Taurus
June 25–December 1: Neptune in Pisces
April 27–October 6: Pluto in Capricorn
July 15–December 19: Chiron in Aries
Sources:
Calendar-12.com - 2021 Moon Phases
Mind-Body Green - Eclipse & Retrograde Calendar For 2021 From The AstroTwins
National Geographic - 10 spectacular stargazing events to watch in 2021
Smithsonian Magazine - Ten Celestial Events to Look Forward to in 2021