The Ultimate 2021 Stargazing Calendar: Celestial Events Guide

Table of Contents

  1. Introduction
  2. Stars & Constellations
  3. Moon Cycles
  4. Meteor Showers
  5. Solar and Lunar Eclipses
  6. Planetary Alignment
  7. Comets
  8. Conclusion


Welcome to the absolute guide to the 2021 Stargazing Calendar. This celestial events guide has been meticulously curated to suit the astronomy enthusiasts, professional stargazers, and anyone else with a flair for observing alluring events unfolding in the night sky.

Stars & Constellations

Understanding stars and constellations forms a crucial part of any stargazing journey. As the Earth spins around its axis, the stars and constellations appear to shift across the sky, making each night a unique spectacle.

January to February

Between January and February, familiar winter constellations like Orion, prominent for the three aligned stars forming ‘Orion’s belt’, are easily visible in the early evening sky. The bright star Sirius, part of the Canis Major constellation, also prominent during this period.

March to April

The arrival of spring from March to April brings the mesmerizing view of the Ursa Major or the ‘Big Dipper’, easily recognizable due to its bucket-and-handle shape.

Moon Cycles

The periodic transformation of the moon, from a thin crescent to full disk illumination, is an irreplaceable part of our monthly stargazing calendar. Each phase of the moon, holds its unique allure and radiance to behold.

Meteor Showers

Meteor showers are an awaited spectacle for any stargazer. These celestial events occur when Earth travels through the trail of particles left behind by a comet or asteroid.

May: Eta Aquariids

Towards the beginning of May, a shower named Eta Aquariids, originating from Halley’s Comet, presents up to 30 meteors per hour at peak.

August: Perseid Meteor Shower

Arguably the most popular of the meteor showers, the Perseid Meteor Shower occurring mid-August offers around 60-70 meteors per hour.

Solar and Lunar Eclipses

Eclipses are among the most remarkable astronomical events, providing an intriguing glimpse into the celestial mechanics of the Sun, Moon, and our Earth.

June: Annular Solar Eclipse

In 2021, an annular solar eclipse occurs on June 10, a spectacular event where the Moon doesn’t completely cover the Sun’s disk, leaving a glowing ‘ring of fire’ around it.

Planetary Alignment

Planetary alignments are breathtaking phenomena, providing a remarkable view of our solar system’s structure. In 2021, many such captivating alignments can be witnessed.

August: Venus and Mars

In the first week of July, look west just after sunset to see the cinematic meet-up of Venus and Mars in the twilight.


Comets, also known as ‘dirty snowballs’, consist of a mixture of ices and rock. As they approach the sun, the ices sublimate, forming an atmosphere called a coma around the nucleus, and often a tail.


This 2021 Stargazing Calendar and celestial events guide will keep you in perfect sync with the night sky’s rhythm, adding an extra sparkle to your stargazing experience.

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