A Galaxy Up Close [Space Astronomy]

2021 ◽  
Vol 16 (3) ◽  
pp. 34-37
Author(s):  
T. Pultarova
Keyword(s):  
1998 ◽  
Author(s):  
Patrick F. Morrissey ◽  
Timothy J. Norton ◽  
Randy A. Kimble

2000 ◽  
Author(s):  
Alain Coulais ◽  
Boris I. Fouks ◽  
Jean-Francois Giovanelli ◽  
Alain Abergel ◽  
Johann See

2013 ◽  
Vol 2013 ◽  
pp. 1-3
Author(s):  
Abid Karim

Freshly coated aluminum mirrors have excellent reflectivity at far ultraviolet wavelengths. However, reflectivity rapidly degrades when the mirror surfaces are exposed to atmosphere. In order to avoid this problem, freshly coated aluminum surface can be protected by over-coating of a removable volatile protecting coating. This protecting coating can be re-evaporated by controlled heating or by some other methods when required. This type of removable coating has immediate application in UV space astronomy. The purpose of this paper is to demonstrate the feasibility of re-evaporation of removable volatile Zn protecting coating using a NiCr thin film heater without affecting the reflection properties of Al mirror surfaces.


1991 ◽  
Vol 25 (4) ◽  
pp. 223-228 ◽  
Author(s):  
J.K. Davies ◽  
T.G. Hawarden ◽  
C.M. Mountain
Keyword(s):  

1978 ◽  
pp. 76-87
Author(s):  
JORGE SAHADE ◽  
FRANK BRADSHAW WOOD
Keyword(s):  

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