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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.
The Einstein ring is formed by gravitational lensing, with the mass of galaxy NGC 6505 bending and magnifying the light from a more distant galaxy into a ring. NGC 6505 is a well-known galaxy only around 590 million light-years from Earth, and Euclid’s discovery of a spectacular Einstein ring here was unexpected.
The Einstein radius is the radius of an Einstein ring, and is a characteristic angle for gravitational lensing in general, as typical distances between images in gravitational lensing are of the order of the Einstein radius.
Einstein’s general theory of relativity predicts that light will bend around objects in space, so that they focus the light like a giant lens, with this effect being bigger for massive galaxies.
In 2010, a series of Baby Einstein box sets called Discovery Kits were made with Julie Aigner-Clark as the director. Later in 2012, they were released as original videos. The nine Discovery Kits came with a DVD, CD with selections of music heard in the video, and a book and discovery cards for small children.
This is a list of children's animated television series (including internet television series); that is, animated programs originally targeted towards audiences aged 12 and under in mind. This list does not include Japanese, Chinese, or Korean series, as children's animation is much more common in these regions.
The rotating disc and its connection with rigidity was also an important thought experiment for Albert Einstein in developing general relativity. [4] He referred to it in several publications in 1912, 1916, 1917, 1922 and drew the insight from it, that the geometry of the disc becomes non-Euclidean for a co-rotating observer. Einstein wrote ...
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