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Solar System

All the posts.
Diagram showing Earth's tilt and the seasons

Saturday, Dec. 21 will be the winter solstice – the shortest day and longest night of the year, with which we mark …

December 19, 2024
Cave opening in the Arsia Mons volcano on Mars

Recently, in social media posts, Dr. Pascal Lee of the SETI Institute discussed the intriguing caves on the side of the giant …

November 23, 2024
Where in the sky the comet will be seen in the evenings in Oct. 2024

A newly discovered comet is now faintly visible in our skies soon after sunset, if you have clear skies and a …

October 15, 2024
Meteors from the Geminids in 2021

Wednesday evening and Thursday morning (Dec. 13-14) is the peak time for one of the best meteor showers of the year – the Geminids. 

December 10, 2023

We make suggestions for how best to see the 2023 Perseid meteor shower.

August 5, 2023
Sample Tube Under Perseverance

What the Perseverance Rover and Ingenuity Helicopter have been doing on Mars.

April 4, 2023
New Comet ZTF

There is a faint new comet in the sky, on an orbit that took it some 50,000 years to come in …

January 27, 2023

It's the Winter Solstice, when we experience the shortest day and longest night.

December 20, 2022

February 18 was the anniversary of the discovery of Pluto (in 1930), and thanks to the efforts of the outreach staff …

February 19, 2022

NASA’s InSight lander on Mars has sent back its first “selfie” — a great mosaic of 11 images, taken by the …

December 20, 2018
Solar System Archives - Andrew Fraknoi - Astronomy Lectures - Astronomy Education Resources