The article discusses the fascinating phenomenon of gravitational lensing, particularly in the galaxy cluster SDSS J1004+4112, where multiple images of a quasar confuse observations. It highlights the case of galaxy NGC 105, which appears to merge with a smaller galaxy, PGC 212515, though they are not related and separated by over 100 million light-years. The article emphasizes that many cosmic objects that visually appear to interact often just lie along the same line-of-sight, creating misinterpretations about their proximity and relationships.
Galaxy NGC 105 appears to be merging with PGC 212515, but this is a visual illusion; they are actually separated by over 100 million light-years.
Gravitational lensing creates stunning visual illusions in space, revealing how light can dramatically alter our perception of distant cosmic objects.
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