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Belfast Telegraph (Reino Unido)
Em 2023: 1 notícias
Desde 1995: 2 notícias
New planet ring system discovered in our Solar System
Publicado em 08 fevereiro 2023
The ring system is around a newly discovered dwarf planet, named Quaoar, which is around half the size of Pluto and orbits the Sun beyond Neptune.
Researchers say it orbits much further out than is typical for other ring systems, calling into question current theories of how ring systems are formed.
The discovery was made by an international team of astronomers using HiPERCAM – an extremely sensitive high-speed camera developed by scientists at the University of Sheffield.
It is [...]
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‘New evidence’ shows how acute stress can lead to grey hair
Publicado em 23 janeiro 2020Scientists believe they have uncovered “new evidence” that shows how acute stress can cause hair to turn white prematurely. Mice experiments have revealed that extreme levels of stress causes the sympathetic nervous system, which is responsible for the body’s rapid involuntary response to dangerous or stressful situations, to become hyperactive. This, in turn, drives the rapid depletion of stem cells responsible for hair colour, leading to pigment loss and development of [...]ver notícia