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Hace 3 días · A simple chart for classifying the main star types using Harvard classification. In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
15 de may. de 2024 · An international team using robotic telescopes around the world recently spotted an Earth-sized planet orbiting an ultra-cool red dwarf, the dimmest and longest-lived of stars. When the universe grows cold and dark, these will be the last stars burning.
17 de may. de 2024 · The Sun is a class G star; these are yellow, with surface temperatures of 5,000–6,000 K. Class K stars are yellow to orange, at about 3,500–5,000 K, and M stars are red, at about 3,000 K, with titanium oxide prominent in their spectra.
- The Editors of Encyclopaedia Britannica
Hace 4 días · Stellarium Web is a planetarium running in your web browser. It shows a realistic star map, just like what you see with the naked eye, binoculars or a telescope.
15 de may. de 2024 · Although all five Europa images from Juno are high-resolution, the image from the spacecraft’s black-and-white SRU offers the most detail. Designed to detect dim stars for navigation purposes, the SRU is sensitive to low light.
23 de may. de 2024 · star, any massive self-luminous celestial body of gas that shines by radiation derived from its internal energy sources. Of the tens of billions of trillions of stars composing the observable universe, only a very small percentage are visible to the naked eye. Many stars occur in pairs, multiple systems, or star clusters.
Hace 5 días · Main Sequence: A diagonal band running from the upper-left (hot, luminous stars) to the lower-right (cool, dim stars) where ~90% of stars lie, including the Sun. Stars on the main sequence are fusing hydrogen into helium in their cores. Red Giants: Cool but luminous stars in the upper-right, more advanced in their evolution.
