Spacewalk expected to begin at 11:55 a.m. However, if you have a good viewing location away from large cities, where the Milky Way would be visible for instance, you can try to spot NOAA satellites. Coverage of Russian Spacewalk 58 to deploy and activate the radiator on the Nauka Multipurpose Laboratory Module. With the ISS orbiting the Earth every 90 minutes, astronauts can see the Sun rise and set around 16 times every 24 hours. The ISS orbits the Earth about once every 90 minutes, so its only visible from a particular location for a short period each day. The light will be constant, so if it flashes, or you see red lights. To make matters more difficult, satellites are relatively small and not very reflective compared with other things we see in space like the space shuttle, International Space Station and, of course, the moon and stars. To spot the ISS, look for a bright, white spot of light moving quickly across the sky. However, the space station is only visible at two distinct times during a 24-hour cycle: dawn and dusk. In the case of the moon, this reflection is sometimes bright enough to see it from Earth during the day. If you like space or astronomy then you will love. In fact, the average naked eye can only see objects up to around +6.5 apparent magnitude. Like the moon, the International Space Station (ISS) is visible from Earth because it reflects the light of the sun. See the Earth as the astronauts see it with a 24/7 video live stream from the International Space Station. The sun, for example, has an apparent magnitude of -26.7, while the faintest stars seen in an urban neighborhood with the naked eye tend to have an apparent magnitude of +3 to +4. The tracker above, developed by ESA, shows where the Space Station is right now and its path 90 minutes ago and 90 minutes ahead. The brighter an object appears to us, the lower its magnitude value. The apparent magnitude of an object describes how bright it appears in the sky from Earth. At their brightest, NOAA satellites have an apparent magnitude of +5.5, which is pretty faint.
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