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Astronomy Events

2021 Astronomical Event Calendar


This listing gives notable astronomical events in our solar system, including eclipses, meteor showers, periodic comets, phases of the moon, and conjunctions of the planets.

Also see list of upcoming space launches.


January 2021

Jan 2-3: Quadrantids meteor shower
Jan 13: New moon phase
Jan 24: Mercury at greatest eastern elongation
Jan 28: Full moon phase (Wolf Moon)


February 2021

Feb 11: New moon phase
Feb 27: Full moon phase (Snow Moon)

Feb 18: NASA Perseverance Mars landing (Jezero Crater)


March 2021

Mar 6: Mercury at greatest western elongation
Mar 13: New moon phase
Mar 20: Vernal (N) | autumnal (S) equinox (09:27 UTC)
Mar 20: Venus at greatest eastern elongation
Mar 28: Full moon phase (Worm Moon)


April 2021

Apr 8: Full (super)moon phase (Pink Moon)
Apr 12: New moon phase
Apr 22-23: Lyrid meteors


May 2021

May 6-7: Eta Aquarid meteors
May 11: New moon phase
May 17: Mercury at greatest eestern elongation
May 26: Total lunar eclipse NASA eclipse map
May 26: Full (super)moon phase (Flower Moon)

May 10: OSIRIS-REx sample departure from asteroid Bennu

"mid-May": China Tianwen-1 Mars landing (Utopia Planitia)


June 2021

Jun 10: New moon phase
Jun 10: Annular solar eclipse NASA eclipse map
Jun 21: Summer (N) | winter (S) solstice(03:21 UTC)
Jun 24: Full (super)moon phase (Strawberry Moon)


July 2021

Jul 4: Mercury at greatest eastern elongation
Jul 10: New moon phase
Jul 24: Full moon phase (Buck Moon)
Jul 28-29: Delta Aquarids meteors

Jul 22: NASA DART launch to asteroids Didymos and Dimorphos
Jul TBA: Astrobotic Peregrine lunar landing


August 2021

Aug 2: Saturn at opposition
Aug 8: New moon phase
Aug 12-13: Perseid meteors
Aug 19: Jupiter at opposition
Aug 22: Full moon phase (Blue Moon)


September 2021

Sep 7: New moon phase
Sep 14: Neptune at opposition
Sep 14: Mercury at greatest eastern elongation
Sep 20: Full moon phase (Harvest Moon)
Sep 22: Autumnal (N) | vernal (S) equinox (19:11 UTC)


October 2021

Oct 6: New moon phase
Oct 7: Draconids meteors
Oct 20: Full moon phase (Hunters Moon)
Oct 21-22: Orionid meteors
Oct 25: Mercury at greatest western elongation

Oct 1: Luna 25 lunar landing
Oct 11: IM-1 Moon Mark lunar landing
Oct 16: NASA "Lucy" launch to multiple Jovian trojan asteroids
Oct 21: IXPE x-ray telescope launch
Oct 31: James Webb telescope launch


November 2021

Nov 4: New moon phase
Nov 4-5: Taurids meteors
Nov 5: Uranus at opposition
Nov 17-18: Leonid meteors
Nov 19: Full moon phase (Beaver Moon)
Nov 19: Partial lunar eclipse NASA eclipse map

Nov TBA: XPoSat x-ray telescope launch
Nov TBA: NASA Artemis 1 lunar orbit


December 2021

Dec 4: Total solar eclipse NASA eclipse map
Dec 4: New moon phase
Dec 13-14: Geminid meteors
Dec 19: Full moon phase (Cold moon)
Dec 21: Winter (N) | summer (S) solstice (15:50 UTC)
Dec 21-22: Ursid meteors






Definitions:

Apogee: point in the Moon's orbit when it is farthest from Earth.

Conjunction: Occurs when two or more bodies appear close together in the sky.

Elongation: is the apparent angular separation of an object from the Sun. Greatest elongation is best for viewing as it is at it's highest point above the horizon.

Inferior conjunction: When planet Mercury or Venus pass between the Sun and the Earth.

Occultation: Passage of one object in front of a smaller one, thus obscuring all or part of the background object from view.

Opposition: When a planet farther from the Sun than Earth appears opposite the Sun in the sky. This is the best time to observe a planet as it is closet to the Earth.

Perigee: point in the Moon's orbit when it is nearest to Earth.

Stationary: Object appears motionless in the sky due to the turning point between its direct and retrograde motion.

Blue moon: Second full moon to occur in a calendar month.

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