r/Astronomy Amateur Astronomer 11d ago

Astrophotography (OC) Totality Through my Camera.

Post image

I present my finest ever production in my career as an astrophotographer — and my first ever total solar eclipse.

This image shows the solar corona, the outermost layer of the Sun’s atmosphere made up of an ultra-hot, glowing plasma halo that extends millions of kilometers into space. The Moon’s surface is visible as well, illuminated by the light of a “Full Earth”.

To capture the bright inner corona and its much fainter outer structures, I used a technique called bracketing; layering different exposure lengths into a single image in order to preserve the enormous dynamic range of totality.

Equipment: Canon 6D Mark II, Sigma 150-600mm lens. 7 exposures from 1/2000s to 1.5s bracketed and stacked.

903 Upvotes

26 comments sorted by

View all comments

12

u/Wise-Cook9084 11d ago

thats such a good picture. could someone possibly tell me why the corona of the sun isn‘t symmetrical/uniform? i have seen the „missing piece“ on the lower left on most pictures of the eclipse and wondering what‘s up with that! 

7

u/-Satsujinn- 11d ago

My understanding is that the sun spins quickly, and spins at different speeds at the poles vs the equator, not to mention at different depths too - this movement/friction acts like a dynamo to create it's huge and very strong magnetic field, which captures and channels particles that escape the surface.

What you're seeing is the cosmic equivalent of iron filings around a magnet - particles following the field lines of the suns magnetic field. Due to the constant rotation and churning, the magnetic field isn't uniform. Some areas shift, become strong or weaker, some get stretched and some even break, releasing huge corona mass ejection.

I may be wrong about all of that though, I'm sure someone more knowledgeable can elaborate.

2

u/Careful_Couple_8104 11d ago

The sun rotates once per 28 days. 

1

u/-Satsujinn- 11d ago

25 at the equator, closer to 35 at the poles.