SaturnIllustrated · motion accelerated
A personal observatory
The sky,
observed.
Astrophotography, field notes, and a universe to explore.
From the archive
Explore archiveLight, gathered over hours.
Tonight at a glance
LoadingA little closer to the night sky.
Sunset
Civil end
Nautical end
Darkness
The Moon
Reading the sky…
—%Illuminated
Find your twilight times, visible planets, and the best hours to look up.
Choose your observing siteBehind the lens
Every clear night
has a story.
Why Mars goes backwards
For two thousand years the retrograde loop was the hardest problem in astronomy. It is a parallax effect, and you can watch it happen.
Read the story →A little understandingFollow your curiosity.
From the light arriving at your lens to the forces shaping the sky.
Explore the concept atlas