Saturn’s 2024 opposition will be on 8 September. Around that time, its rings will appear to glow brighter than usual due to retroreflectivity. Soon afterwards, however, the rings will be edge-on and become entirely invisible.
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What is a moon, and can it be an asteroid?
Inspired by a video of an eclipse of Phobos, Bill wondered about the definitions of moons, planets and asteroids. Why are potato shapes important, and how did Phobos stop being one and start being another?
Getting an image of a comet using the Benro Polaris
Bill used the Benro Polaris tracking mount to get images of comet Tsuchinshan-ATLAS. This post tells the story of the expedition. He also reviews the Polaris.
What’s the time on the Moon?
How do we tell the time on the Moon? This will be an important issue once humans establish a long-term presence there. We list a few of the problems with time, and how they’ll probably agree on a single Coordinated Lunar Time.