IIUM ASTRONOMY CLUB

Archive for May, 2009

Pemetaan, Menentukan Kiblat di Era Kejayaan Islam

 

kiblat

Para ilmuwan Muslim di era keemasan peradaban Islam telah mengembangkan metode pemetaan. Dengan menguasai pemetaan, para astronom mampu menentukan posisi lintang dan bujur tempat-tempat di permukaan bumi. Hasilnya bisa digunakan untuk beragam kepentingan. Salah satunya  untuk menghitung hasil pengamatan posisi benda-benda yang ada di langit.

Menurut Ahmad Y al-Hassan dan Donald R Hill dalam karyanya bertajuk Islamic Technology: An Illustrated History mengungkapkan, para astronom Muslim memiliki beberapa cara untuk menemukan koordinat suatu benda di langit. Salah satunya dengan menentukan garis meridian, yakni garis yang melintang dari arah selatan suatu tempat kemudian ditarik hingga ke kutub utara langit dan titik zenith.

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ROBOTIC TELESCOPE ETX-LS

Starworthy: Brian Klutch

Take a guided tour of the cosmos, led by a robotic telescope. Meade’s ETX-LS is the first scope to automatically point itself at interesting celestial bodies, no human help required. As an extra benefit for beginners, it plays an informational audio clip through its speaker (or a video clip if you plug it into a monitor) once it locks on a worthy star.

Other computerized telescopes can navigate the heavens, but only after you aim them at reference stars so they can orient themselves in space. The ETX-LS automates even this step, picking out glowing dots with a camera instead of your fallible eyes. First a motor turns the scope to the approximate patch of sky where a reference star should appear, as calculated by a built-in compass and GPS receiver. Then the ETX-LS snaps a picture with its 0.3-megapixel camera sensor. It searches the shot for a fleck of the correct brightness to home in on the reference star. Bonus: That same camera can also take snapshots of your extraterrestrial sightseeing.

By Ker Than

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