Send to friendNatural X-rays from across the space are of very high energy but luckily our atmosphere shields us. This means X-ray telescopes must be above the atmosphere to see distant objects emitting X-rays.
More than 100,000 X-ray sources have been detected across the Universe. The most distant object seen in X-rays is 13 billion lightyears from Earth
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"We know very little, and yet it is astonishing that we know so much and still more astonishing that so little knowledge can give us so much power." - Bertrand Russel
“The most incomprehensible thing about the world is that it is comprehensible” - Einstein
“It is more important to have beauty in the equations of physics than to have them agree with experiments”. - P. A. M. Dirac
"The chess-board is the world; the pieces are the phenomena of the universe; the rules of the game are what we call the Laws of Nature. The player on the other side is hidden from us. We know that his play is always fair, and patient. But also we know, to our cost, that he never overlooks a mistake, or makes the smallest allowance for ignorance" - Thomas Huxley
"Nature and Nature's laws lay hid in night,
God said "Let Newton be", and all was light." - Alexander Pope
"Big whirls have little whirls,
That feed on their velocity
And little whirls have lesser whirls,
An so on to viscosity" -- Lewis Richardson
"An ocean traveller has even more vividly the impression that
the ocean is made of waves that that it is made of water" - A.S. Eddington