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Evolution of the solar luminosity, radius and effective temperature compared to the present-day Sun. After Ribas (2010) [1] The solar luminosity (L ☉) is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.
(The S 10 unit is defined as the surface brightness of a star whose V-magnitude is 10 and whose light is smeared over one square degree, or 27.78 mag arcsec −2.) The total sky brightness in zenith is therefore ~220 S 10 or 21.9 mag/arcsec² in the V-band. Note that the contributions from Airglow and Zodiacal light vary with the time of year ...
A text editor is a type of computer program that edits plain text. An example of such program is " notepad " software (e.g. Windows Notepad ). [ 1 ] [ 2 ] [ 3 ] Text editors are provided with operating systems and software development packages, and can be used to change files such as configuration files , documentation files and programming ...
[citation needed] As entering the real-time mode was by typing cntl+R, this was known as control-R mode. At the same time, Rici Liknaitski added input-time macros (cntl+]), which operated as the command string was read rather than when executed. [citation needed] Read-time macros made the TECO auxiliary text buffers, called Q-registers, more ...
National Language Authority in Pakistan has been at the forefront in introducing Urdu Informatics as a tool for the standardisation of Urdu language. [1] Major steps in this respect include the development of Urdu keyboard and launching of software to automate translations between Urdu and English languages .
The time of dusk is the moment at the very end of astronomical twilight, just before the minimum brightness of the night sky sets in, or may be thought of as the darkest part of evening twilight. [4] However, technically, the three stages of dusk are as follows: At civil dusk, the center of the Sun's disc goes 6° below the horizon in the ...
Make web pages easy to read for you! With simple keyboard shortcuts, you can zoom in or out to make text larger or smaller. In an instant, these commands improve the readability of the content you're viewing. • Zoom in - Press Ctrl (CMD on a Mac) + the plus key (+) on your keyboard.
InPage is a word processor and page layout software by Concept Software Pvt. Ltd., an Indian information technology company. It is used for languages such as Urdu, Arabic, Balti, Balochi, Burushaski, Pashto, Persian, Punjabi, Sindhi and Shina under Windows and macOS.