herschel

The book is a work of natural theology, and incorporates extracts from correspondence he had been having with John Herschel on the subject.

Although he did talk about William Herschel he failed to mention his theory about life on the sun.

By orbiting at L2, some 1.5 million kilometres from Earth, Herschel is not troubled by any atmospheric absorption.

So if Herschel leaves L2, will it go into a permanent heliocentric orbit or will it decay?

Congratulations to the Herschel team, and a huge thank-you to the taxpayers that funded it!

I think that Herschel was more well know for reflectors, and he built one with a 1.2m diameter mirror.

Estimated cost of the Herschel Space telescope, lets say 850 million dollars [1] The cost of a SpaceX launch to LEO, 85 million dollars.

So there's no physical reason for Herschel to not use a cryocooler.

Does anyone know why the Herschel was so far from earth?

Specifically, I'd like to thank Joe and Rhonda, Pam and Dell, and Herschel and Vicki.

To answer your question, Herschel has its base requirements similar to anything we send off into space, and then it had it optics instruments requirements.

I wonder how much more expensive Herschel would have been, if ESA had gone with an closed-cycle cooler instead of using a limited liquid Helium supply directly.

Of the 11 comets for which measurements have been made, it is only the Jupiter-family Comet 103P/Hartley 2 that was found to match the composition of Earth’s water, in observations made by ESA’s Herschel mission in 2011." When I first read the headline, I wasn't sure if the claim was that the water vapor had mixtures of other chemical molecules in it, or what.

My question was about Herschel, for which planetary protection is irrelevant because its not visiting any planets.

Herschel Walker claims to have bench pressed 375 the first time he ever tried.

I'm not sure I agree with this catagorization but the article does make me interested in learning more about Herschel.