Juwelen im All (NASA)
Das NASA WEBB Teleskop hat wieder einmal ein atemberaubendes Juwel entdeckt. Das Licht einer Galaxie, Quasar, wird durch immense Massen in unserer Sichtlinie so "verbogen" und abgelenkt, dass wir von hier aus gleich viermal das selbe sehen. Es ist ein und dasselbe Objekt, welches hier vierfach abgebildet und gespiegelt wird. Einsteinlinse, oder Gravitationslinse wird dieses Phänomen genannt.
Gravitationally lensed quasar - like jewels on a ring
Diamonds of the season 💎
These
glittering “gems,” or glowing orange dots, are actually four images of
the same thing — an extremely bright galactic core known as a quasar.
The quasar appears like an arc with four bright spots because of an
intriguing effect called gravitational lensing.
The
gravity of a massive foreground object, in this case a galaxy, is so
powerful that it has warped time and space around it. Light followed
that bend and took various paths, magnifying and creating multiple
copies of the quasar behind the galaxy.
Gravitational
lensing is a great way for scientists to study very distant objects
that might be too faint or far. Combining this natural “magnifying
glass” with Webb’s mid-infrared capabilities, scientists can learn more
about the quasar's central black hole. Webb's observations will also
probe the nature of dark matter, an invisible form of matter that
accounts for most of the universe's mass.
Read more: esawebb.org/images/potm2406a/
Credit: ESA/Webb, NASA & CSA, A. Nierenberg
Image
description: A small image of a galaxy appears as a dim blue ring. At
the top of the ring are three very bright orange spots, right next to
each other. These are copies of a single quasar in the galaxy. A fourth
copy can be seen towards the bottom of the ring. In the center of the
ring, there is a foreground elliptical galaxy with such powerful gravity
that it is magnifying the other galaxy and its quasar. It appears as a
small blue dot. The background of this image is black and empty.
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