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Date: June 10, 2021, Significance: The Moon covers the center of the Sun, leaving a 'ring of fire' visible around the edges, Visibility: Central path visible in parts of Canada, Greenland, and Russia; partial eclipse visible in North America, Europe, and northern Asia.

Date: October 13, 2020, Significance: Mars at closest approach to Earth making it appear larger and brighter, occurs every 26 months, Visibility: Visible all night, looking very bright and with a reddish hue, from anywhere on Earth.

Date: April 26, 2021, Significance: A full moon at its closest approach to Earth in its orbit, making it appear larger and brighter, Visibility: Visible everywhere on Earth during night time, weather permitting.

Date: Annually around December 14, Significance: Known for bright and intensely colored meteors, originating from asteroid 3200 Phaethon, Visibility: Observable from around the world with clearest view in the Northern Hemisphere.

Date: February 9, 1986, Significance: Most famous of the short-period comets, visible from Earth every 75-76 years, Visibility: Last observed with naked eye globally.

Date: September 28, 2015, Significance: Part of the 2014-2015 lunar tetrad, also called a 'Blood Moon' for its reddish color, Visibility: Visible from the Americas, Europe, Africa, west Asia, and the eastern Pacific.

Date: Annually around August 12, Significance: One of the most prolific and reliable meteor showers, associated with Comet Swift-Tuttle, Visibility: Best observed in the Northern Hemisphere.

Date: Annually around November 17, Significance: Known for producing meteor storms in cycles of approximately 33 years, Visibility: Visible from Earth under a clear, dark sky.

Date: June 5-6, 2012, Significance: Last occurrence of Venus passing directly between Earth and the Sun until 2117, Visibility: Visible as a small dot moving across the Sun's face globally, weather permitting.