Character Encoding :utf-8

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   This website is using utf-8 character encoding in HTML , character encoding is used to represent a repertoire of characters by some kind of encoding system.

Facebook Pixel

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   The Facebook pixel is an analytics tool that allows you to measure the effectiveness of your advertising by understanding the actions people take on your website.

Google Analytics

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   Google Analytics is a web analytics service offered by Google that tracks and reports website traffic, currently as a platform inside the Google Marketing Platform brand.

SPF

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   The Sender Policy Framework (SPF) is an email-authentication technique which is used to prevent spammers from sending messages on behalf of your domain. With SPF an organisation can publish authorized mail servers.

Microsoft Office 365

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   Microsoft Office 365 is a Software as a Service (SaaS) solution that includes Microsoft Office and other services, such as email and collaboration, from Microsoft’s cloud server. Microsoft Office 365 provides desktop functionalities and is available by subscription.

English - Language

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   this website is using English as a language parameter

Facebook SDK

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   The Facebook SDK for JavaScript provides a rich set of client-side functionality

jquery 2.2.0

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   JavaScript library for DOM operations

Google Publisher Tags

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   Google Publisher Tags (GPT) is an ad tagging library with which you can dynamically build ad requests. GPT takes key details from you (such as ad unit code, ad size, and key-values), builds the request, and displays the ad on web pages or mobile apps.

Google Tag Manager

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   Google Tag Manager is a tag management system created by Google to manage JavaScript and HTML tags used for tracking and analytics on websites (variants of e-marketing tags, sometimes referred to as tracking pixels or web beacons.

Twitter Cards

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   With Twitter Cards, you can attach rich photos, videos and media experiences to Tweets, helping to drive traffic to your website.

AddThis

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   AddThis free website tools include share buttons, targeting tools and content recommendations help you get more likes, shares and followers

Pragma Header - backwards compatibility with HTTP/1.0

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   The Pragma HTTP/1.0 general header is an implementation-specific header that may have various effects along the request-response chain. It is used for backwards compatibility with HTTP/1.0 caches where the Cache-Control HTTP/1.1 header is not yet present.

Meta Description

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   A meta description is a 160-character snippet, a meta tag in HTML, that summarizes a page`s content. this website is having meta description of the following : Astronomy.com is for anyone who wants to learn more about astronomy events, cosmology, planets, galaxies, asteroids, astrophotography, the Big Bang, black holes, comets, constellations, eclipses, exoplanets, nebulae, meteors, quasars, observing, telescopes, NASA, Hubble, space missions, stargazing, and more

Meta keywords

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   Meta keywords are types of meta tags in the HTML source code of a webpage. They describe the content of a website shortly and concisely,this website is using the following keywords: Amateur astronomy, amature astronomy, andromeda, Antimatter, aperture, apogee, apparition, archaeoastronomy, asterism, asteroid, astronomer, astonomy, astromony, astronamy, astronomy magazine, astronomi, astronomie, astronmy, astronomy mag, astronomy charts, astronomical, astrophotography, astrophysics, atmosphere, big bang, binoculars, black hole, blueshift, bolide, Cassegrain, Cassini, celestial, circumpolar, collimation, comet, conjunction, constellation, corona, cosmic microwave background, cmb, cosmic ray, cosmic-ray, dark adaption, dark adaptation, dark sky, deep sky, drift method, earth, earthlike, earth-like, eclipse, earthshine, exoplanet, extrasolar, eyepiece, finder scope, field of view, f-ratio, galaxy, galaxies, gamma ray, gamma-ray, go-to, go to, goto, gravity, heliocentric, interactive star chart, Kuiper belt, kuyper belt, light speed, light-speed, light year, light-year, light pollution, magnitude, messier, mars, moon, lunar eclipse, mercury, venus, Jupiter, Saturn, Uranus, Neptune, Pluto, nebula, nebulae, news, nebulosity, NASA, ESA, nova, novae, oort, p Cygni, meteor, shooting star, physics, planetarium, planet, protoplanet, quasar, quasi-stellar object, titan, Enceladus, radial, red giant, redshift, red-shift, scope, sky, skyglow, sky glow, sky guide, skyguide, skywatcher, sky watcher, solar, solar system, space, spcae, sapce, shuttle, spacecraft, space craft, star, star atlas, star chart, starchart, star coordinates, star gazer, stargazer, star gazing, stargazing, star gaze, stargaze, starlike, sun, sunlike, sun-like, telescope, transit, wormhole, zodiac

schema.org micro-markup

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   Schema.org is a collaborative, community activity with a mission to create, maintain, and promote schemas for structured data on the Internet, on web pages, in email messages, and beyond.

No Cache Content

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   Forces caches to submit the request to the origin server for validation before releasing a cached copy.

NO Store HTTP Cache-Control

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   The cache should not store anything about the client request or server response.

Google Hosted Libraries

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   The Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.

ASP.NET

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   ASP.NET is an open-source server-side web application framework designed for web development to produce dynamic web pages.

ASP.NET 4.0.30319

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   ASP.NET is an open-source server-side web application framework designed for web development to produce dynamic web pages.

Viewport - initial-scale

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   The viewport is the user`s visible area of a web page. The viewport varies with the device, and will be smaller on a mobile phone than on a computer screen. Before tablets and mobile phones, web pages were designed only for computer screens, and it was common for web pages to have a static design and a fixed size.

Viewport - Mobile compatible

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   The viewport is the user`s visible area of a web page. The viewport varies with the device, and will be smaller on a mobile phone than on a computer screen. Before tablets and mobile phones, web pages were designed only for computer screens, and it was common for web pages to have a static design and a fixed size.

Viewport - Width

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   The viewport is the user`s visible area of a web page. The viewport varies with the device, and will be smaller on a mobile phone than on a computer screen. Before tablets and mobile phones, web pages were designed only for computer screens, and it was common for web pages to have a static design and a fixed size.