Makanya ayo kita saksikan besok tgl 27 agst lihat ke langit...utk cek kebenarannya...
Yen ing tawang ono lintang... po ra...
From: Dicka Dauphin <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: [email protected]
Subject: Re: [mm-ugm] Let's see together
Date: Sun, 14 Aug 2005 20:30:22 -0700 (PDT)
>Kutipan dari staf pengajar astronomi ITB ( ferry M.
>Simatupang) yang berada di Universitas Groningen,
>Belanda:
>
>kalo membaca postingnya, kayaknya ini posting dari
>kejadian tahun 2003 lalu deh, bukan yang tahun 2005.
>fyi, mars mendekat ke bumi setiap 26 bulan. makanya
>setiap 2 tahun, amerika memanfaatkannya dengan
>mengirim wahana angkasa ke mars. so, actually nothing
>so special about it.
>
>itu posting bohong kalo bilang 'it will look like the
>earth has 2 moons'. a big lie. soalnya saat itu
>terjadi (27 agustus 2003), diameter sudut mars kalo
>dilihat dari bumi hanya 25,11 detik busur. padahal
>diameter sudut bulan saat itu adalah 1907,63 detik
>busur (atau 1907,63/60 = 31,8 menit busur). jadi
>ukuran mars saat itu sekitar 76 kali lebih kecil dari
>bulan. mars dengan mata telanjang tetap terlihat
>sebagai titik, hanya saja cahayanya lebih terang dari
>kecerlangan rata-ratanya sepanjang tahun.
>
>variasi jarak terdekat bumi-mars (dengan periode
>sekitar 26 bulan itu) dari tahun ke tahun juga tidak
>terlalu besar. variasi ini disebabkan oleh perubahan
>kepepatan orbit masing-masing mars dan bumi yang
>berubah, dan sumbu major/minor orbit yang juga
>berputar (bentuk elips orbitnya yang berevolusi).
>sebagai contoh:
>
>tahun jarak bumi-mars (dalam au)
>1999 0,5785
>2001 0,4502
>2003 0,3727
>2005 0,4541
>2007 0,5893
>2010 0,6640
>2012 0,6737
>
>bandingkan misalnya yang tahun 2003 (magnitud -2,9)
>dengan tahun 2005 (magnitud -2,3). dengan beda jarak
>ke bumi 0,0814 au, beda kecerlangannya hanya sekitar
>0,6 magnitud, cukup sulit dibedakan kecerlangannya ini
>dengan mata telanjang.
>
>
>
>--- Earning Power <[EMAIL PROTECTED]> wrote:
>
>
>---------------------------------
>
>
>
>
>
>
>
> >>Something strange....
> >>
> >>Moon is 0.384 million km from the earth, having
>3480km of diameter.
> >>Mars is 34.65 million miles ( 55.44million km) away
>from the earth
> >>and
> >>has a diameter of 6800km.
> >>
> >>Distance 144 times and diameter is two times, Mars
>may look as
> >>large as
> >>1/72 times smaller than Moon.
> >>
> >>Anyway, check with your naked eyes on 27 Aug.
> >>
> >>Best Regards
> >>Akihito Shigeno
> >>
> >>
> >>
> >>Dear ALL,
> >>Just want to tell you that:
> >>"Planet Mars will be the brightest in the night sky
> >>starting August. It will look as large as the full
>moon to the
> >>naked
> >>eye. This will cultimate on Aug. 27 when Mars comes
>within 34.65M
> >>miles of earth. Be sure to watch the sky on Aug. 27
>12:30 am. It
> >>will
> >>look like the earth has 2 moons. The next time Mars
>may come this
> >>close
> >>is in 2287. Share this with ur friends as NO ONE
>ALIVE TODAY will
> >>ever
> >>see it again...^^"
> >>
> >>Let's see together then...
>
>
>
>
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