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  2. Einstein ring - Wikipedia

    en.wikipedia.org/wiki/Einstein_ring

    An Einstein Ring is a special case of gravitational lensing, caused by the exact alignment of the source, lens, and observer. This results in symmetry around the lens, causing a ring-like structure. [2] The geometry of a complete Einstein ring, as caused by a gravitational lens. The size of an Einstein ring is given by the Einstein radius.

  3. Cloverleaf quasar - Wikipedia

    en.wikipedia.org/wiki/Cloverleaf_quasar

    CCD image of the Cloverleaf quasar taken in March 1988 by the ESO/MPI 2.2m telescope. The four separated images are part of the quasar. The 4 quasar images were originally discovered in 1984; in 1988, they were determined to be a single quasar split into four images, instead of 4 separate quasars.

  4. Gravitational microlensing - Wikipedia

    en.wikipedia.org/wiki/Gravitational_microlensing

    A(u) always decreases as u increases, so the closer the alignment, the brighter the source becomes. As u approaches infinity, A(u) approaches 1, so that at wide separations, microlensing has no effect. Finally, as u approaches 0, for a point source A(u) approaches infinity as the images approach an Einstein ring.

  5. Einstein radius - Wikipedia

    en.wikipedia.org/wiki/Einstein_radius

    For a dense cluster with mass M c ≈ 10 × 10 15 M ☉ at a distance of 1 Gigaparsec (1 Gpc) this radius could be as large as 100 arcsec (called macrolensing). For a Gravitational microlensing event (with masses of order 1 M ☉) search for at galactic distances (say D ~ 3 kpc), the typical Einstein radius would be of order milli-arcseconds ...

  6. Rare 'Einstein Ring' captured by Hubble reveals the ... - AOL

    www.aol.com/hubble-captures-einstein-ring...

    A new photograph from the Hubble Space Telescope shows a stunning “Einstein Ring” billions of light-years from Earth — a phenomenon named after Albert Einstein.

  7. Gravitational lens - Wikipedia

    en.wikipedia.org/wiki/Gravitational_lens

    The same value as Soldner's was calculated by Einstein in 1911 based on the equivalence principle alone. [13]: 3 However, Einstein noted in 1915, in the process of completing general relativity, that his (and thus Soldner's) 1911-result is only half of the correct value. Einstein became the first to calculate the correct value for light bending.

  8. Strong gravitational lensing - Wikipedia

    en.wikipedia.org/wiki/Strong_gravitational_lensing

    Strong gravitational lensing is a gravitational lensing effect that is strong enough to produce multiple images, arcs, or Einstein rings. Generally, for strong lensing to occur, the projected lens mass density must be greater than the critical density , that is Σ c r {\displaystyle \Sigma _{cr}} .

  9. These 89 Appetizers Might Just Be The Best Part Of ... - AOL

    www.aol.com/89-appetizers-might-just-best...

    Turkey Cheese Ball. Even if you're not serving turkey this Thanksgiving doesn't mean you can't get in on the theme. Enter: this adorable cheeseball.We used carrots, pecans, pretzels, and bell ...