UHZ1 is a background galaxy containing a quasar. At a redshift of approximately 10.1, UHZ1 is at a distance of 13.2 billion light-years, seen when our universe was about 3 percent of its current age. This redshift made it the most distant, and therefore earliest known quasar in the observable universe as of 2023. To detect this object, astronomers working at the Chandra X-ray Observatory used the Abell 2744's cluster mass as a gravitational lens in order to magnify distant objects directly behind it. At the time of discovery, it exceeded the distance record of QSO J0313−1806.
"}{"fact":"Cats are subject to gum disease and to dental caries. They should have their teeth cleaned by the vet or the cat dentist once a year.","length":133}
{"fact":"An adult lion's roar can be heard up to five miles (eight kilometers) away.","length":75}
{"fact":"When a cat chases its prey, it keeps its head level. Dogs and humans bob their heads up and down.","length":97}
{"fact":"Cats often overract to unexpected stimuli because of their extremely sensitive nervous system.","length":94}
{"fact":"Cats see six times better in the dark and at night than humans.","length":63}
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{"type":"standard","title":"Helmholtz–Kohlrausch effect","displaytitle":"Helmholtz–Kohlrausch effect","namespace":{"id":0,"text":""},"wikibase_item":"Q5709374","titles":{"canonical":"Helmholtz–Kohlrausch_effect","normalized":"Helmholtz–Kohlrausch effect","display":"Helmholtz–Kohlrausch effect"},"pageid":23271819,"thumbnail":{"source":"https://upload.wikimedia.org/wikipedia/commons/thumb/6/62/Helmholtz-Kohlrausch_effect_visualized_improved.png/330px-Helmholtz-Kohlrausch_effect_visualized_improved.png","width":320,"height":132},"originalimage":{"source":"https://upload.wikimedia.org/wikipedia/commons/6/62/Helmholtz-Kohlrausch_effect_visualized_improved.png","width":1000,"height":412},"lang":"en","dir":"ltr","revision":"1289086937","tid":"8c2e491c-2a71-11f0-b8ca-6a317639b2a5","timestamp":"2025-05-06T11:59:22Z","description":"Perceptual phenomenon","description_source":"local","content_urls":{"desktop":{"page":"https://en.wikipedia.org/wiki/Helmholtz%E2%80%93Kohlrausch_effect","revisions":"https://en.wikipedia.org/wiki/Helmholtz%E2%80%93Kohlrausch_effect?action=history","edit":"https://en.wikipedia.org/wiki/Helmholtz%E2%80%93Kohlrausch_effect?action=edit","talk":"https://en.wikipedia.org/wiki/Talk:Helmholtz%E2%80%93Kohlrausch_effect"},"mobile":{"page":"https://en.m.wikipedia.org/wiki/Helmholtz%E2%80%93Kohlrausch_effect","revisions":"https://en.m.wikipedia.org/wiki/Special:History/Helmholtz%E2%80%93Kohlrausch_effect","edit":"https://en.m.wikipedia.org/wiki/Helmholtz%E2%80%93Kohlrausch_effect?action=edit","talk":"https://en.m.wikipedia.org/wiki/Talk:Helmholtz%E2%80%93Kohlrausch_effect"}},"extract":"The Helmholtz–Kohlrausch effect is a perceptual phenomenon wherein the intense saturation of spectral hue is perceived as part of the color's luminance. This brightness increase by saturation, which grows stronger as saturation increases, might better be called chromatic luminance, since \"white\" or achromatic luminance is the standard of comparison. It appears in both self-luminous and surface colors, although it is most pronounced in spectral lights.","extract_html":"
The Helmholtz–Kohlrausch effect is a perceptual phenomenon wherein the intense saturation of spectral hue is perceived as part of the color's luminance. This brightness increase by saturation, which grows stronger as saturation increases, might better be called chromatic luminance, since \"white\" or achromatic luminance is the standard of comparison. It appears in both self-luminous and surface colors, although it is most pronounced in spectral lights.
"}{"slip": { "id": 224, "advice": "Don't drink bleach."}}