Heavens-Above
heavens-above.com
When the space station crosses your sky, to the second
Cosmos & ScaleA minuteFree, no sign-up
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Cosmos & Scale
Where every planet and bright comet is, right now
theskylive.com
Instant · Works anywhere
Free, no sign-up · online since 2013
TheSkyLive computes live positions for the planets, the Moon, bright comets and a long list of tracked objects, then gives rise and set times for your location. Each object gets a finder chart, a distance readout that ticks in real time, and a plot of how its brightness is changing.
The comet pages are the reason to bookmark it: a chart, a current magnitude and an honest answer on whether it is worth walking outside tonight.
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Picked for a shared category and overlapping vibe, not for popularity.
heavens-above.com
When the space station crosses your sky, to the second
in-the-sky.org
A calendar of everything visible from where you live
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Fly out through our stellar neighbourhood, one star at a time
apod.nasa.gov
One space image a day, explained by a working astronomer
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Scroll from quantum foam out to the observable universe
spacetelescopelive.org
What Hubble and Webb are pointed at this very minute