This time-lapse video, obtained June 8, 2018, shows the precise choreography of NASA’s Neutron star Interior Composition Explorer (NICER) as it studies pulsars and other X-ray sources from its perch aboard the International Space Station. NICER observes and tracks numerous sources each day, ranging from the star closest to the Sun, Proxima Centauri, to X-ray sources in other galaxies. Movement in the movie, which represents a little more than one 90-minute orbit, is sped up by 100 times.
NASA
<a rel="nofollow" class="external free" href="https://svs.gsfc.nasa.gov/13031">https://svs.gsfc.nasa.gov/13031</a> (<a rel="nofollow" class="external text" href="https://svs.gsfc.nasa.gov/vis/a010000/a013000/a013031/NICER_ISS_Square_30sec.mp4">video link</a>)