Go alfresco on a dark, moonless night. Attending up. Is it December or January? Check out Betelgeuse, aglow dully red at Orion’s shoulder, and Rigel, a laser dejected at his knee. A ages later, chicken Capella rides aerial in Auriga.
Is it July? Acquisition Vega, a azure in Lyra, or Antares, the orange-red affection of Scorpius.
In fact, any time of the year you can acquisition colors in the sky. Best stars attending white, but the brightest ones appearance color. Red, orange, yellow, blue… about all the colors of the rainbow. But hey, delay a sec. Area are the blooming stars? Shouldn’t we see them?
Nope. It’s a actual accepted question, but in actuality we don’t see any blooming stars at all. Here’s why.
Take a blowtorch (figuratively!) and calefaction up an adamant bar. After a moment it will afterglow red, afresh orange, afresh bluish-white. Afresh it’ll melt. Better use a pot holder.
Why does it glow? Any bulk aloft the temperature of complete aught (about -273 Celsius) will afford light. The bulk of ablaze it gives off, and added chiefly the amicableness of that light, depends on the temperature. The warmer the object, the beneath the wavelength.
Cold altar afford radio waves. Extremely hot altar afford ultraviolet light, or X-rays. At a actual attenuated of temperatures, hot altar will afford arresting
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