X-ray photographs of the sun on March 7, 1970.
The Sun was photographed from an Aerobee rocket by means of equipment responding to the wavelength interval 3-60 angstroms, revealing interesting relationships between structures in the corona.
VanSpeybroeck
L P
LP
Americal Science and Engineering, Cambridge, Massachusetts, USA.
Krieger
A S
AS
Vaiana
G S
GS