The International Space Station (ISS) orbits the Earth every 90mins – it travels at about 17,000 mph and about 250 miles altitude.
You can quite often catch a glimpse of it crossing the sky at morning or evening twilight when it reflects the Sun’s light. Occasionally it transits (crosses) the Sun (or Moon) – if you happen to be in the correct position on the Earth. This was a transit observable from Bexhill on the 12th June 2025. The transit ‘window’ is only about 10km (6 miles) wide and at maximum lasts about 0.6 sec.
This was taken with a ZWO Seestar S30 with a solar filter in Video mode in Alt Az mode. The transit was due at 13:17:01 and a 4 minute video was taken to ensure it captured the transit. The image is a montage of all the video frames containing the ISS.
Warning: Do not attempt to image the Sun without the appropriate filters – or you will melt your eye/camera/telescope.