What's Inside:
📍How to find ISS passes for your location
⏰Best apps for pass notifications
👀What to look for in the sky
📸How to photograph the ISS
🔭Seeing ISS details with a telescope
HOW TO SPOT THE INTERNATIONAL SPACE STATION
WHAT TO LOOK FOR
Appearance - Bright white "star" moving steadily across sky. No blinking lights (that's a plane).
Brightness - Often brighter than any star! Can reach magnitude -6 (brighter than Venus).
Speed - Crosses entire sky in about 4-5 minutes. Faster than a plane.
Direction - Usually moves west to east (but can vary).
WHEN TO LOOK
Timing - Only visible 1-2 hours after sunset or before sunrise when sky is dark but ISS is in sunlight.
Frequency - Multiple passes per night sometimes. Other times none for days. Check predictions!
Best Passes - Look for "high" passes (60°+) that are longer and brighter.
TRACKING TOOLS
Spot The Station (NASA) - spotthestation.nasa.gov - Email/text alerts for your location. FREE!
Heavens-Above - heavens-above.com - Detailed predictions, star charts, other satellites.
ISS Detector App - Android/iOS. Real-time tracking, push notifications.
N2YO - n2yo.com - Real-time tracking map.
ISS FACTS
Size - As big as a football field. Largest human-made object in space.
Altitude - About 250 miles (400 km) up. Orbits every 90 minutes.
Speed - 17,500 mph (28,000 km/h). Sunrise every 45 minutes for crew!
Crew - Usually 6-7 astronauts from multiple countries.
VIEWING TIPS
- Sign up for NASA Spot The Station alerts - they text you!
- Know where it will appear (direction, degrees above horizon)
- Get outside 5 minutes early to let eyes adjust
- Watch for it to fade as it enters Earth's shadow
- With binoculars you might see the shape!
- Wave to the astronauts - they're looking down too!
OTHER SATELLITES TO SPOT
- Starlink trains - Strings of satellites shortly after launch
- Tiangong - Chinese space station (dimmer than ISS)
- Hubble Space Telescope - Occasionally visible
- Iridium flares - Bright flashes from communication satellites