The International Space Station will be visible to the naked eye tonight. The station orbits the Earth at a height of 254 miles and travels at a mind-blowing 17,500 miles per hour, or 4.76 miles per second.
- Tonight, it will become visible at 5:36 PM in the southwestern sky and will travel to the northeast. It will be visible for about seven minutes. It will move at a maximum height of about 79° above the horizon.
The space station will look like a bright star, like the North Star, and will be moving quickly across the evening sky.
The space station passes overhead many times a day but lighting conditions usually make it difficult or impossible to see. All sightings will occur within a few hours before or after sunrise or sunset. This is the optimum viewing period as the sun reflects off the space station and contrasts against the darker sky.
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