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SPT0418-47
SPT0418-47 is a young and extremely distant galaxy, discovered in 2020, that is surprisingly similar to the Milky Way. We see it as it was when the universe was only 1.4 billion years old. It is surprisingly non-chaotic and contradicts the theory that all galaxies in the early Universe were turbulent and unstable. It is located at a distance of about twelve billion light years from the Earth's home galaxy, the Milky Way. The circular image (on the left of the accompanying picture) is our distorted view of the galaxy; the distortion is due to the gravity of a galaxy (between the Earth and the galaxy SPT0418-47 and not visible in this image) which focuses the light from SPT0418-47 into a ring. Computer modelling can be used to undo the distortion, revealing the galaxy's true appearance: a rotating disk with central bulge (on the right of the accompanying picture).Science, page 751, August 14 2020, Volume 369, Issue 6505) References Galaxies Horologium (constellation) {{ga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horologium (constellation)
Horologium (Latin , the pendulum clock, from Ancient Greek, Greek , ) is a constellation of six stars faintly visible in the southern celestial hemisphere. It was first described by the French astronomer Nicolas-Louis de Lacaille in 1756 and visualized by him as a clock with a pendulum and a second hand. In 1922 the constellation was redefined by the International Astronomical Union (IAU) as a region of the celestial sphere containing Lacaille's stars, and has since been an IAU designated constellations, IAU designated constellation. Horologium's associated region is wholly visible to observers south of 23rd parallel north, 23°N. The constellation's brightest star—and the only one brighter than an apparent magnitude of 4—is Alpha Horologii (at 3.85), an aging orange giant star that has swollen to around 11 times the diameter of the Sun. The Mira variable, long-period variable-brightness star, R Horologii (4.7 to 14.3), has one of the largest variations in brightness among al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
