⚡ Thor’s Lightning – SNR G150.3+4.5
An ancient cosmic lightning streak silently crosses the constellation Camelopardalis.
This faint structure is SNR G150.3+4.5, the expanding remnant of a star that exploded thousands of years ago. The shockwave from that supernova continues to move through interstellar space, forming a vast shell of ionized gas.
In deep exposures, delicate filaments of hydrogen (Hα) and faint traces of ionized oxygen (OIII) appear as fragmented arcs, resembling a gigantic lightning bolt across the sky.
The remnant spans nearly 3° across the sky—about six times the apparent size of the full Moon—and is thought to lie roughly 2,000 light-years away. Its emission is extremely faint, so only long integrations reveal this fragile web of expanding gas: the visible echo of a stellar explosion that happened millennia ago.
Telescope: ESPRIT 100
Camera: QHY268M
Mount: EQ6R-P
Ha: 60×600″
OIII: 135×600″
R: 150×60″
G: 150×60″
B: 150×60″
40 hours Hoo+RGB stars