Hubble is very close to my heart, and going back to Hubble, because I was there once already in 1993, is really a great privilege for me.

The objects that are of moderate energy, like our sun or most of the stars that we see in the night sky with the naked eye, are objects in which relatively moderate energy processes are taking place.

In general, the objects in the universe that are very high-energy objects, or the processes that are high-energy processes, will radiate more in the short wavelength range towards the gamma rays or the x-rays.

Claude Nicollier Quotes