Uploaded June 2025 | Updated September 2026, 8 hours ago
English below
Kurzes Zeitraffervideo der Sonnenaktivität am 21. Juni 2025 zwischen 13:40 und 19:20 MESZ.
Short timelapse video showing the solar activity on June 21, 2025 between 13:40 and 19:20 CEST.
Equipment:
NEQ6, Elite Phoenix 40/400, UV/IR Cut Filter, ASI678m
Credit: astropage.eu
English below
Kurzes Zeitraffervideo der Sonnenaktivität am 21. Juni 2025 zwischen 13:40 und 19:20 MESZ.
Short timelapse video showing the solar activity on June 21, 2025 between 13:40 and 19:20 CEST.
Equipment:
NEQ6, Elite Phoenix 40/400, UV/IR Cut Filter, ASI678m
Credit: astropage.eu

![Pulsar vanishes from view due to space-time warp
http://www.astropage.eu/index_news.php?id=1710 Astronomen untersuchen seltenes Pulsar-Doppelsternsystem
The pulsar in the binary pulsar system PSR J1906+0746 vanished from view due to the space-time warp generated by nearby companion star. Orbit after orbit, the pulsar travels through a space-time that is curved, which made its spin axis wobble so much that the beams no longer hit Earth. Astrophysicists estimate the pulsar will wobble back into view, but it might take as long as 160 years.
First animation details the effect of geodetic precession in the observer pulsar. Two neutron stars orbit one another. The star visible as a pulsar shows rotating beams. The companion is frozen at the frame center. In a flat space-time, where the companion is massless but the pulsar does orbit it for illustrative purpose, the pulsar rotation axis (represented by the arrow) is unchanged after one orbit. Once the companion mass increases to the measured 1.32 solar mass (about half a million Earth masses, but in a sphere only 10 kilometer across), space-time curves. Within one orbit, the pulsar axis now slants (the effect is exaggerated 1 million times here). Because of that change, the pulsar is now all but invisible from Earth.
Second animation of the observed pulsar, J1906+0746, presents the effect of geodetic precession on its visibility from Earth. Two neutron stars orbit one another. The star visible as a pulsar is shown with rotating beams. The counter in the top right counts up the years through which the pulsar was detected. From 1998 to about 2005, beams for both poles hit Earth. After 2005 only the main beam hits Earth. From about 2014 on, both beams miss Earth, and because of that, the pulsar is now all but invisible. Time scale and angles exaggerated for illustrative purposes. The geodetic precession continues, however, and the pulsar may re-appear around 2170.
Credit: Joeri van Leeuwen/ASTRON
Joeri Van Leeuwen, Laura Kasian, Ingrid H. Stairs, D. R. Lorimer, F. Camilo, S. Chatterjee, I. Cognard, G. Desvignes, P. C. C. Freire, G. H. Janssen, M. Kramer, A. G. Lyne, D. J. Nice, S. M. Ransom, B. W. Stappers, J. M. Weisberg. The Binary Companion of Young, Relativistic Pulsar J1906 0746. arXiv:1411.1518 [astro-ph.SR] Pulsar vanishes from view due to space-time warp](https://i.ytimg.com/vi/sWmaLQo1lJA/mqdefault.jpg)








