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One nominal solar luminosity is defined by the International Astronomical Union to be 3.828 × 10 26 W. [2] The Sun is a weakly variable star, and its actual luminosity therefore fluctuates. [3] The major fluctuation is the eleven-year solar cycle (sunspot cycle) that causes a quasi-periodic variation of about ±0.1%. Other variations over the ...
The apparent magnitude is the observed visible brightness from Earth which depends on the distance of the object. The absolute magnitude is the apparent magnitude at a distance of 10 pc (3.1 × 10 17 m), therefore the bolometric absolute magnitude is a logarithmic measure of the bolometric luminosity.
The Urdu keyboard is any keyboard layout for Urdu computer and typewriter keyboards. Since the first Urdu typewriter was made available in 1911, the layout has gone through various phases of evolution. [1] With time, the variety of layouts introduced in the 1950s for mechanized compositions have reduced to very few that are compatible with the ...
10 −5: 10 −4: 10 −3: mcd/m 2: 100 μcd/m 2: Cloudy night sky without moon [4] 400 μcd/m 2 "Darkest sky" [5] 1 mcd/m 2: Night sky [6] 1.4 mcd/m 2: Typical photographic scene lit by full moon [7] 10 −2: 5 mcd/m 2: Approximate scotopic/mesopic threshold [8] 10 −1: 10 0: cd/m 2: 2 cd/m 2: Floodlit buildings, monuments, and fountains [9 ...
IBM states that AltGr is an abbreviation for alternate graphic. [3] [4]Sun Microsystems keyboard, which labels the key as Alt Graph. A key labelled with some variation of "Alt Graphic" was on many computer keyboards before the Windows international layouts.
Sunlight takes about 8.3 minutes to reach Earth from the surface of the Sun. [3] A photon starting at the center of the Sun and changing direction every time it encounters a charged particle would take between 10,000 and 170,000 years to get to the surface. [4]
Google Input Tools, also known as Google IME, is a set of input method editors by Google for 22 languages, including Amharic, Arabic, Bengali, Chinese, Greek, Gujarati, Hindi, Japanese, Kannada, Malayalam, Marathi, Nepali, Persian, Punjabi, Russian, Sanskrit, Serbian, Tamil, Telugu, Tigrinya, and Urdu. It is a virtual keyboard that allows users ...
The top edge of the keyboard is rounded. The keyboard has a special "diamond" key (called Meta key) placed next to the space key. This key comes from Lisp machines and is meant to be used with the Emacs editor. It also has 3 keys for regulating volume control or screen brightness and a power key in the upper top corner.