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A star-forming region in the Large Magellanic Cloud. A star is a luminous spheroid of plasma held together by self-gravity. [ 1] The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light.
Photosphere. The photosphere is a star's outer shell from which light is radiated. It extends into a star's surface until the plasma becomes opaque, equivalent to an optical depth of approximately ⁄, [ 1] or equivalently, a depth from which 50% of light will escape without being scattered. A photosphere is the region of a luminous object ...
An armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (on the celestial sphere ), consisting of a spherical framework of rings, centered on Earth or the Sun, that represent lines of celestial longitude and latitude and other astronomically important features, such as the ecliptic.
A ringing of a bell during the Christmas season represents the proclamation of joy and happiness for Christ’s birth. Also, like the ringing bell used to herd errant sheep back into the fold, the ...
For more than a hundred years, scientists believed that Stonehenge’s central sandstone slab — long called the “altar stone" — came from much closer Wales. But a study last year by some of ...
Since then, the month of March has gone purple, green and white in honor of the women who've paved the way — and continue to do so today. “The use of the colors purple, green, and white to ...
The night sky is the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon . Natural light sources in a night sky include moonlight, starlight, and airglow, depending on location and timing. Aurorae light up the skies above the ...
Calendars used by Hindus worldwide. A page from the Hindu calendar 1871-72. The Hindu calendar, also called Panchanga(Sanskrit: पञ्चाङ्ग), is one of various lunisolar calendarsthat are traditionally used in the Indian subcontinentand Southeast Asia, with further regional variations for social and Hindureligious purposes.