Petr Hykš:
Solar chromosphere
Petr Hykš:
Partial solar eclipse
Petr Hykš:
Big sunspot AR3363 and 100 others
Petr Hykš:
Chromosphere on November 25th, 2023
Petr Hykš:
Chromosphere in Ca II K
Petr Hykš:
Chromosphere in H-alpha & Ca II K
Petr Hykš:
Chromosphere in H-alpha
Petr Hykš:
AR3590, the largest sunspot of Solar Cycle 25
Petr Hykš:
Big prominance 2024/7/23
Petr Hykš:
Solar flare C8.2, high activity 2024/7/28
Petr Hykš:
High solar activity 2024/7/28
Petr Hykš:
High solar activity 2024/7/29