For here, am I sitting in a tin can
Far above the world.
Planet earth is blue
And there's nothing I can do.
— David Bowie

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General information Solar Space weather ISS Satellites More Other space (historical)

General information

Solar

Harvard solar cycle prediction (abstract) Cycle 25 maximum = 2023.2 ± 1.1 with a peak of 154 ± 12 sunspots
SolarHam ham-related solar conditions (aurora, sunspots, activity, forecast)
Get a Solar Education [PDF] middle- and high-school-level paper on how the Sun affects the Earth
Sunspot Watch (radio propagation / sunspot cycle)

Space weather

Space Weather
The Space Weather Woman (Dr. Tamitha Skov)
NOAA
NOAA Spaceweather Dashboard

ISS (International Space Station)

AstroViewer and the current ISS position
ISS Tracker (real-time graphical tracker, incuding current altitude and speed)
Spot the Station (can sign up for visible alerts, app)
Heavens Above (plus satellites)
N2YO (all passes)
ARISS (Amateur Radio on the ISS)
ISS Fan Club (frequencies, modes, power, antennas)
Beginner's guide for contacting the ISS

ISS astronaut availability for radio contacts (Mountain Time):

Activity	From	To
Early free time	0130	0230
Late free time	1230	1330
Weekend free time	0130	1330


What the ISS astronauts see (live streaming video, including audio, from the ISS)

Satellites

Satellite schedules (skeds)
How to use the Arrow II and an HT to communicate with satellites (excellent video)
Amateur radio satellites
Amateur Radio Satellite Service (Facebook group)
AmSat (satellites)
AmSat (Facebook group)
How-to presentation (PPT by KN4TIP)
DIY satellite antennas

SO-50 information
Passes
Live position
Live position
Step-by-step frequency instructions
Step-by-step operating instructions [PDF]
How to work a satellite (by Noji)

AO-91 information
Passes

AO-92 information
Passes

All current LEO satellites (live by NASA)

More space

Watchers (Earth and space)
The Hubble Space Telescope
Real-time Hubble Space Telescope view
Voyager spacecraft
Martuan rovers

Other

Historical

The Solar Storm of 1859 (Carrington Event)