J1000+0221

This image shows the quadruple gravitational lens J1000+0221. Image credit: NASA / ESA / A. van der Wel.

J1000+0221 was the most distant gravitational lens galaxy known (up until the discovery of the IRC 0218 lens galaxy), and remains the most distant quad-image lens galaxy discovered so far. A very recent discovery by a group of astronomers led by Dr Arjen Van der Wel from the Max Planck Institute for Astronomy in Heidelberg, Germany, the results of which are accepted for publication on Oct 21, 2013 in the Astrophysical Journal Letters (arXiv.org). Using NASA’s Hubble Space Telescope, the astronomers discovered this quadruple gravitational lens dubbed J1000+0221 which would provide a further test for Einstein’s theory of general relativity. These gravitational lenses also serve as light magnification tools that help astronomers to look at distant galaxies thus acting as a natural telescope.^[1][2]

References

Relativity
Special relativity	Background Principle of relativity Special relativity Foundations Frame of reference Speed of light Hyperbolic orthogonality Rapidity Maxwell's equations Formulation Galilean relativity Galilean transformation Lorentz transformation Consequences Time dilation Relativistic mass Mass–energy equivalence Length contraction Relativity of simultaneity Relativistic Doppler effect Thomas precession Relativistic disks Spacetime Light cone World line Spacetime diagram Biquaternions Minkowski space
General relativity	Background Introduction Mathematical formulation Fundamental concepts Special relativity Equivalence principle World line Riemannian geometry Minkowski diagram Phenomena Black hole Event horizon Frame-dragging Geodetic effect Lenses Singularity Waves Ladder paradox Twin paradox Two-body problem Equations ADM formalism BSSN formalism Einstein field equations Geodesic equation Friedmann equations Linearized gravity Post-Newtonian formalism Hamilton–Jacobi–Einstein equation Advanced theories Brans–Dicke theory Kaluza–Klein Mach's principle Quantum gravity Solutions Schwarzschild (interior) Reissner–Nordström Gödel Kerr Kerr–Newman Kasner Taub–NUT Milne Robertson–Walker pp-wave van Stockum dust Weyl−Lewis−Papapetrou
Scientists	Einstein Lorentz Hilbert Poincaré Schwarzschild de Sitter Reissner Nordström Weyl Eddington Friedmann Milne Zwicky Lemaître Gödel Wheeler Robertson Bardeen Walker Kerr Chandrasekhar Ehlers Penrose Hawking Taylor Hulse Stockum Taub Newman Yau Thorne Weiss Bondi Misner others