How to see the International Space Station from your backyard

International Space Station viewing can be done from any spot around the world, as long as the weather cooperates.

The International Space Station (ISS) is the largest human-made object in space and can be seen from anywhere on Earth when conditions are right.

The football field-sized space laboratory flies 250 miles above Earth’s surface at a speed of around 17,500 mph and has been continuously crewed by astronauts since Nov. 2, 2000.

Although the ISS is always orbiting the Earth, it is not always visible and requires a small amount of planning and cloud-free weather to spot.

The ISS can be the third brightest object in the sky after the sun and the moon, making it easy to see from urban areas like New York City, Chicago or Los Angeles. It may look like a plane at first, but the ISS will shine as a solid white dot that slowly sweeps across the sky, as opposed to airplanes that have blinking lights.

“The space station is visible because it reflects the light of the Sun – the same reason we can see the Moon,” NASA said. “However, unlike the Moon, the space station isn’t bright enough to see during the day. It can only be seen when it is dawn or dusk at your location,” NASA said.

Additionally, the ISS cannot be seen when it is flying through Earth's shadow since there is no sunlight for it to reflect back down to Earth.

When can I see the International Space Station?

Whether the space station is visible on a given night depends on its orbit and the time it passes overhead.

There are many websites and cell phone apps that can be used to notify onlookers when the ISS will be visible. This includes NASA’s Spot The Station website, which lists every time the ISS will be visible for towns and cities around the world over the next two weeks.

Each time the ISS passes overhead is different. On some passes, it is very dim and is not visible for long, while other times it is incredibly bright and visible for over five minutes. Those planning to look for the ISS should plan to view it on a night when it will be in the sky for a longer period of time as these are typically the brightest passes.

Additionally, people should check the AccuWeather Astronomy weather forecast for their area to see if clouds will interfere with viewing conditions.

The ISS is bright enough for most cell phones to capture images or videos of it as it flies overhead.

Like all night photography, it is best to use a tripod to keep the phone steady. Additionally, long-exposure photography is a great way to capture how the ISS swiftly slides across the night sky with a field of stars as a backdrop. Most smartphones are equipped with cameras that are able to take long-exposure photographs.

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While a telescope is not needed to spot the station, those with a good telescope and proper equipment can look for it when it passes across the face of the moon or sun.

Seeing the ISS pass in front of the sun or moon, known as a transit, takes a fair amount of planning and will likely require some travel. It also requires precise timing as the space station will fly across the face of the sun or moon in the blink of an eye.

Those trying to see the ISS as it transits the sun will also need to ensure that they have the proper safety equipment. Looking at the sun through a telescope without the proper solar filter can be extremely dangerous and lead to permanent eye damage.

During the 2017 total solar eclipse, some photographers traveled to very specific locations in the United States so they could witness the ISS transit the sun during a partial phase of the solar eclipse.

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