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Posts by
Guy Ottewell
How fast is daytime growing? Guy Ottewell explains
How fast is daytime growing? A table in this post shows differences in the time of sunrise as we approach the March equinox.
March 16, 2023
The 5 petals of Venus and its 8-year cycle
Learn about the 8-year cycle of Venus in our sky and the petals of Venus, a rhythmic motion of Venus when viewed from an Earth-centered perspective.
January 22, 2023
The green comet: Comet 2022 E3 ZTF
Learn about the trajectory of the green comet - Comet 2022 E3 ZTF - by the renowned astronomer Guy Ottewell. The comet will be closest to Earth on February 2.
January 17, 2023
Northern autumn ahead. Here’s your equinox sky
Northern autumn arrives on September 22 or 23, 2022, with the equinox. The time and date depend on precisely where you live. Find out more here.
September 20, 2022
Full and near moon July 13
Learn more - and see charts - related to the July 13, 2022, nearest full moon of 2022 from master chart-maker Guy Ottewell.
July 11, 2022
Helioconjunction of Jupiter and Neptune on June 6
There will be a helioconjunction of Jupiter and Neptune on June 6, 2022. That is, as seen from the sun, Jupiter will overtake Neptune.
June 5, 2022
Constellations and signs: what’s the difference?
What is the difference between signs of the zodiac and constellations of the zodiac? Astronomer Guy Ottewell illustrates and discusses this difference.
June 4, 2022
Double star orbits: New charts of Sirius and Albireo
Learn more about the double star orbits of 2 famous stars - Sirius and Albireo - with these fascinating charts from Guy Ottewell.
March 16, 2022
Venus passages compared: 2017 to 2022
Venus will sweep near the sun in our sky (inferior conjunction) on January 8-9. Astronomer Guy Ottewell uses his great skill at illustration to compare this with past Venus passages.
January 7, 2022
Past-and-future Earths ring in New Year
Past-and-future Earths. A novel way of picturing ourselves riding on Earth, orbiting the sun, from astronomer Guy Ottewell.
December 28, 2021
