Kamis, 26 September 2013

Ketika tangan dan kaki berkata

65. Pada hari ini Kami tutup mulut mereka; dan berkatalah kepada Kami tangan mereka dan memberi kesaksianlah kaki mereka terhadap apa yang dahulu mereka usahakan.  (Yaasin : 65)

Akan datang hari... Mulut dikunci
Kata…tak ada lagi
Akan tiba masa… tak ada suara
Dari… mulut kita

Berkata tangan kita..
Tentang apa yang dilakukannya
Berkata kaki kita..
Kemana saja dia melangkahnya

Tanggung jawab tiba… robbana
Tangan kami.. Kaki kami..
Mulut kami.. Mata hati kami

Luruskanlah.. Kukuhkanlah..
Di jalan cahaya.. Sempurna
Mohon karunia.. Kepada kami
Hamba-Mu yang hina

23. Dan jangan sekali-kali kamu mengatakan tentang sesuatu: "Sesungguhnya aku akan mengerjakan ini besok pagi, 
24. kecuali (dengan menyebut): "Insya Allah". Dan ingatlah kepada Tuhanmu jika kamu lupa dan katakanlah: "Mudah-mudahan Tuhanku akan memberiku petunjuk kepada yang lebih dekat kebenarannya dari pada ini."  
(Al-Kahfi : 23-24)

Sorry, Astronomy.. :)


Assalamu’alaikum… ^_^
Alhamdulillah, it’s been a long long long time I don’t post any writing here. (sorry I’m gonna be 4L@Y. hehe)
Well, I feel lost today. I just miss sumthin I love that I've left a (little) long time. The reason I post this calendar (though this year is gonna end soon, inshaAllah) is I wanna say sorry to my love (astronomy) this way. Really, IDK why I did a stupid thing –rarely saw the spectacular night sky- My activities made me a little busy n I just felt tired to do my beloved activity; enjoying the incredible of the night sky. Hmmm, let it be. The new page must be opened for I face my new world now. I just wanna be better (academically, non-academically, n religiously).  
Let’s read this one carefully! :p You’ll feel excited (inshaAllah) for on these three last months of this year we’ll face some of superb things! XD
  • January 3, 4 - Quadrantids Meteor Shower. The Quadrantids are an above average shower, with up to 40 meteors per hour at their peak. The shower usually peaks on January 3 & 4, but some meteors can be visible from January 1 - 5. The near last quarter moon will hide many of the fainter meteors with its glare. Best viewing will be from a dark location after midnight. Look for meteors radiating from the constellation Bootes.
  • January 11 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 19:44 UTC.
  • January 27 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 04:38 UTC.
  • February 10 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 07:20 UTC.
  • February 25 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 20:26 UTC.
  • March 11 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 19:51 UTC.
  • March 20 - March Equinox. The March equinox occurs at 11:02 UTC. The Sun will shine directly on the equator and there will be nearly equal amounts of day and night throughout the world. This is also the first day of spring (vernal equinox) in the northern hemisphere and the first day of fall (autumnal equinox) in the southern hemisphere.
  • March 27 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 09:27 UTC.
  • April 10 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 09:35 UTC.
  • April 20 - Astronomy Day Part 1. Astronomy Day is an annual event intended to provide a means of interaction between the general public and various astronomy enthusiasts, groups and professionals. The theme of Astronomy Day is "Bringing Astronomy to the People," and on this day astronomy and stargazing clubs and other organizations around the world will plan special events. You can find out about special local events by contacting your local astronomy club or planetarium. You can also find more about Astronomy Day by checking the Web site for the Astronomical League.
  • April 21, 22 - Lyrids Meteor Shower. The Lyrids are an average shower, usually producing about 20 meteors per hour at their peak. These meteors can produce bright dust trails that last for several seconds. The shower usually peaks on April 21 & 22, although some meteors can be visible from April 16 - 25. The gibbous moon could be a problem this year, hiding many of the fainter meteors in its glare. It will set before sunrise, providing a short window of dark skies. Look for meteors radiating from the constellation of Lyra after midnight.
  • April 25 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 19:57 UTC.
  • April 25 - Partial Lunar Eclipse. The eclipse will be visible throughout most of Africa, Europe, Asia, and Australia.
    (NASA Map and Eclipse Information)
  • April 28 - Saturn at Opposition. The ringed planet will be at its closest approach to Earth and its face will be fully illuminated by the Sun. This is the best time to view and photograph Saturn and its moons.
  • May 5, 6 - Eta Aquarids Meteor Shower. The Eta Aquarids are a light shower, usually producing about 10 meteors per hour at their peak. The shower's peak usually occurs on May 5 & 6, however viewing should be good on any morning from May 4 - 7. The crescent moon will hang around for the show, but should not cause too many problems. The radiant point for this shower will be in the constellation Aquarius. Best viewing is usually to the east after midnight, far from city lights.
  • May 10 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 00:28 UTC.
  • May 10 - Annular Solar Eclipse. The path of annularity will begin in western Australia and move east across the central Pacific Ocean. (NASA Map and Eclipse Information)
  • May 25 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 04:25 UTC.
  • May 28 - Conjunction of Venus and Jupiter. The two bright planets will be within 1 degree of each other in the evening sky. The planet Mercury will also will also be visible nearby. Look to the west near sunset.
  • May 25 - Penumbral Lunar Eclipse. The eclipse will be visible throughout most of North America, South America, western Europe, and western Africa. (NASA Map and Eclipse Information)
  • June 8 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 15:56 UTC.
  • June 21 - June Solstice. The June solstice occurs at 05:04 UTC. The North Pole of the earth will be tilted toward the Sun, which will have reached its northernmost position in the sky and will be directly over the Tropic of Cancer at 23.44 degrees north latitude. This is the first day of summer (summer solstice) in the northern hemisphere and the first day of winter (winter solstice) in the southern hemisphere.
  • June 8 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 15:56 UTC.
  • June 23 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 11:32 UTC.
  • July 8 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 07:14 UTC.
  • July 22 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 18:15 UTC.
  • July 28, 29 - Southern Delta Aquarids Meteor Shower. The Delta Aquarids can produce about 20 meteors per hour at their peak. The shower usually peaks on July 28 & 29, but some meteors can also be seen from July 18 - August 18. The radiant point for this shower will be in the constellation Aquarius. The last quarter moon will be around for the show and may hide some of the fainter meteors. Best viewing is usually to the east after midnight.
  • August 6 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 21:51 UTC.
  • August 12, 13 - Perseids Meteor Shower. The Perseids is one of the best meteor showers to observe, producing up to 60 meteors per hour at their peak. The shower's peak usually occurs on August 13 & 14, but you may be able to see some meteors any time from July 23 - August 22. The radiant point for this shower will be in the constellation Perseus. The near first quarter moon will set before midnight, leaving optimal conditions and dark skies for what should be an awesome show. Find a location far from city lights and look to the northeast after midnight.
  • August 21 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 01:45 UTC.
  • August 27 - Neptune at Opposition. The blue planet will be at its closest approach to Earth and its face will be fully illuminated by the Sun. This is the best time to view Neptune. Due to its distance, it will only appear as a tiny blue dot in all but the most powerful telescopes.
  • September 5 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 11:36 UTC.
  • September 19 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 11:13 UTC.
  • September 22 - September Equinox. The September equinox occurs at 20:44 UTC. The Sun will shine directly on the equator and there will be nearly equal amounts of day and night throughout the world. This is also the first day of fall (autumnal equinox) in the northern hemisphere and the first day of spring (vernal equinox) in the southern hemisphere.
  • October 3 - Uranus at Opposition. The blue-green planet will be at its closest approach to Earth and its face will be fully illuminated by the Sun. This is the best time to view Uranus. Due to its distance, it will only appear as a tiny blue-green dot in all but the most powerful telescopes.
  • October 12 - Astronomy Day Part 2. Astronomy Day is an annual event intended to provide a means of interaction between the general public and various astronomy enthusiasts, groups and professionals. The theme of Astronomy Day is "Bringing Astronomy to the People," and on this day astronomy and stargazing clubs and other organizations around the world will plan special events. You can find out about special local events by contacting your local astronomy club or planetarium. You can also find more about Astronomy Day by checking the Web site for the Astronomical League.
  • October 5 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 00:34 UTC.
  • October 18 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 23:38 UTC.
  • October 18 - Penumbral Lunar Eclipse. The eclipse will be visible throughout most of the world except for Australia and extreme eastern Siberia. (NASA Map and Eclipse Information)
  • October 21, 22 - Orionids Meteor Shower. The Orionids is an average shower producing about 20 meteors per hour at their peak. This shower usually peaks on the 21st, but it is highly irregular. A good show could be experienced on any morning from October 20 - 24, and some meteors may be seen any time from October 17 - 25. The gibbous moon will be a problem this year, hiding all but the brightest meteors with its glare. Best viewing will be to the east after midnight. Be sure to find a dark location far from city lights.
  • November 3 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 12:50 UTC.
  • November 3 - Hybrid Solar Eclipse. The eclipse path will begin in the Atlantic Ocean off the eastern coast of the United States and move east across the Atlantic and across central Africa. (NASA Map and Eclipse Information)
  • November 17 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 15:16 UTC.
  • November 17, 18 - Leonids Meteor Shower. The Leonids is one of the better meteor showers to observe, producing an average of 40 meteors per hour at their peak. The shower itself has a cyclic peak year every 33 years where hundreds of meteors can be seen each hour. The last of these occurred in 2001. The shower usually peaks on November 17 & 18, but you may see some meteors from November 13 - 20. The full moon will prevent this from being a great show this year, but with up to 40 meteors per hour possible, this could still be a good show. Look for the shower radiating from the constellation Leo after midnight.
  • December 3 - New Moon. The Moon will be directly between the Earth and the Sun and will not be visible from Earth. This phase occurs at 00:22 UTC.
  • December 13, 15 - Geminids Meteor Shower. Considered by many to be the best meteor shower in the heavens, the Geminids are known for producing up to 60 multicolored meteors per hour at their peak. The peak of the shower usually occurs around December 13 & 14, although some meteors should be visible from December 6 - 19. The radiant point for this shower will be in the constellation Gemini. The gibbous moon could be a problem this year, hiding man of the fainter meteors. But with up to 60 meteors per hour predicted, this should still be a good show. Best viewing is usually to the east after midnight from a dark location.
  • December 17 - Full Moon. The Moon will be directly opposite the Earth from the Sun and will be fully illuminated as seen from Earth. This phase occurs at 09:28 UTC.
  • December 21 - December Solstice. The December solstice occurs at 17:11 UTC. The South Pole of the earth will be tilted toward the Sun, which will have reached its southernmost position in the sky and will be directly over the Tropic of Capricorn at 23.44 degrees south latitude. This is the first day of winter (winter solstice) in the northern hemisphere and the first day of summer (summer solstice) in the southern hemisphere

Halogen - Salt Former yang Spesial



“Heeiii!! Semua anggota halogen ayo bekumpul!”, gelegar suara sang leader,  Fluor, menyapa pagi di asrama Halogen, kampung SPU blok VIIA dengan kehebohan. ”Mana Astatine? Kok beberapa waktu ini ga keliatan?”, tanya Fluor dengan pandangannya yang menyapu berih seluruh anggota Halogen.
”Mana kami tau, dia kan suka ngilang.”, sahut Khlor, sang artis Halogen yang terkenal akan produk garamnya, NaCl.
”Walah, kamu kan paling gampang berikatan alias supel di Halogen, perhatian dikit dong.”, timpal Fluor, leader tiada dua dengan sifatnya yang paling reaktif dan elektronegatif, serta toxic di Halogen.
”Nah dia sih, sok misterius. Sifat-sifatnya belum banyak diketahui.Radiokatif yang gampang meluruh, jangan suka heboh deh kalo dia ngilang lagi.”, ketus Khlor.
Sejak ditemukan Karl Wilhelm tahun 1744 di Swedia, Khlor, wakil ketua di Halogen, penghuni kamar bernomor 17 lorong 3, memang agak jutek. Dia ingin melupakan dirinya yang pernah menjadi senjata kimiawi Jerman pada Perang Dunia I. Kini, dia cuma ingin mengabdi dalam hal positif pada manusia, mulai sebagai antiseptic, insektisida, bahan pemutih pada produksi kertas dan tekstil, agen desinfektan pada proses pemurnian air dengan senyawanya HClO, bahan aktif pengangkat kotoran, bahan baku PVC, serta pelarut senyawa organik.Tapi, akhir-akhir ini dia menggalau lagi karena produk hasil kerja sama dengan ketua, Fluor, yaitu CFC sukses melubangi lapisan ozon, serta DDT yang mencemari lingkungan dilarang dan dibatasi konsumsinya.
“Astatine lahir dari Bismuth tahun 1940 di United States. D.R. Corson, K.R. MacKenzie, dan  E.Segre memang jenius telah menemukan Astatine, elemen terlangka yang sekarang jadi anggota Halogen. Astatine unik ya..”, papar Iodine. Sosok yang berguna bagi orang-orang di area bencana nuklir ini memang paling dekat dengan Astatine. Bagaimana tidak, baik Iodine maupun Astatine, mereka sama-sama punya sifat logam, tapi Astatine lebih semi-logam, Astatine pun ternyata juga bisa terakumulasi di Thyroid seperti Iodine.
”Males bahas Astatine terus. Mending ke dapur menemui kasihku, Natrium mumumu..”, ujar Khlor. Dia memang sangat menyayangi kekasihnya itu, mereka bertemu di lautan lepas. Mereka pun sering jalan bareng di pabrik-pabrik industri kimia anorganik, meski dengan kehadiran OH di sisi Natrium.
”Asyik ya kerjanya bareng pacarnya. Yaudalah, ayo kita kerja juga, yey!”, semangat Iodine membara. Ya, hari ini dia dapat job di Rumah Sakit untuk mengevaluasi kerja Thyroid manusia, serta membantu pengobatan kanker Thyroid dengan isotopnya, I-131. Iodine jarang digunakan di kalangan manusia, tapi bukan berarti dia tidak berguna. Dia ditemukan Bernard Courtois tahun 1811 dan terlahir sebagai manufacture of saltpetre (bagian penting dari gunpowder) saat Perancis dalam perang. Iodine, si essential trace element adalah bagian dari hormone Thyroid, jika manusia defisiensi Iod, kelenjar gondok mereka kan bengkak. Karena sifat beracunnya, Iodine berguna sebagai detector material berenergi photon tinggi. Iodine juga bekerja sama dengan hidrogen membentuk asam Iodic lalu bekerja sebagai indikator kuat-lemahnya basa pada kimia analisis. Penghuni kamar nomor 53 lorong 5 ini juga berkecimpung di dunia fotografi bersama partnernya, Perak, sama seperti Bromine.
“Ciee.. yang dapet job, seneng ni. Haha.”, goda Bromine, si penghuni kamar bernomor 35 lorong 4. Pada tahun 1826 Antoine J. Balard-lah yang menemukan Bromine yang kini aktif sebagai pemurni air kolam renang, desinfektan, obat penenang dengan partner Natrium, pelarut, reagent, dan pengemulsi pada pembuatan soft drink dengan perasa jeruk. Bromine juga aktif di bidang manufaktur sebagai etil dibromida.
”Hehe.. ya doong.”, timpal Iodine.
”Oke, aku ke kamar mandi dulu ye, nemuin Natrium, mau bersihin gigi manusia. Hihi..,”, pamit Fluor, si keren dari kamar nomor 9 lorong 2, hadir sebagai sosok korosif kecuali saat ia kerja sama dengan Sulfur sebagai insulator tegangan tinggi dengan penahan panas istimewa.
***
          Malam pun menyapa. Bersama senyum bulan malam merangkum lamunan si misterius Astatine.
 “When my time comes, forget the wrong that I’ve done, help me leave behind some reasons to be missed…”
Leave out all the rest-nya Linkin Park dari MP3 Astatine mengusik kesunyian malam. Astatine yang sempat menghilang, hadir lagi di atap kamarnya yang bernomor 85 lorong 6. Bentangan angkasa dengan gemerlap bintang terkuak di kedua matanya.Dalam kesendirian, ia melamunkan nasibnya yang punya waktu paruh singkat, isotopnya yang paling panjang umur, At-210 saja punya waktu paruh hanya 8,3 jam. Dia memang terlahir dengan hidup yang tidak stabil.
”Kangen temen-temen Halogen.. ”, gumam Astatine.”Lagunya pas banget, 8 jam lagi aku pergi untuk waktu yang lama.”
Bukan hanya lagu yang pas, ternyata waktu yang dipilih iodine buat jalan-jalan juga pas. Iodine melonjak girang begitu melihat sosok yang ia rindui, Astatine.
”Wuooo... Astatine!! Akhirnya balik juga, aku kangen..”, jeritan Iodine menepis nyanyian MP3 Astatine dan ketenangan Halogen malam itu.
Ternyata Fluor bukan satu-satunya yang menghebohkan Halogen, malam ini Iodine jadi lakonnya. Fluor, Khlor,dan Bromine pun langsung menyerbu TKP dan serempak berseru, “Astatine!!”
”Yo-ho! Aku balik lagi, guys..Hahaha”, timpal Astatine diiringi tawa renyah.
“Dasar Iodine, bikin heboh aja..”, ketus Khlor. “Tapi...”
Linkin Park mengakhiri lagunya. Hening.
”Aku kangen Astatine..”, bisik Khlor.
”Hahaha, aku juga. Aku kangen kalian semua.”, sembur Astatine.
”Haiahh.. tadi gayamu sok cuek banget sama hilangnya Astatine, Khlor.”, serang Bromine.
”Udah, udah.. sekarang yang penting kan Astatine udah kembali.”, Fluor menengahi.
”Oiyaa.. mumpung ngumpul gini. Aku pamit deh, besok aku meluruh lagi dan ga muncul untuk waktu yang lama. Hehe. ”,ujar Astatine.
”Yahhh.. bakal kangen lagi ni. ”, Iodine menimpali.
”Maap laah.Aku juga bakal kangen. Kalian yang rukun yaa. Dengan segala sifat yang kita miliki, jangan mau disalahgunakan manusia.”, Astatine berlagak keibuan.
          ”Yo! Pasti!”, ikrar Fluor, Khlor, Bromine, dan Iodine serempak.
          ”Sip! Sekarang, yuk nyari pagi bersama!!”, Astatine bersorak tanpa peduli pada malam yang semakin merindui pagi. Halogen pun mericuh bersama.
Ya, inilah Halogen, diatomik yang bervariasi; Fluor, si kuning pucat dan Khlor si hijau kekuningan, mereka sama-sama gas, ada pula Bromine, si merah cair, Iodine, si padatan ungu kehitaman yang bisa transformasi jadi gas ungu biru pada suhu kamar, juga Astatine, si metalik padat .Halogen, sangat reaktif, oksidator kuat, dihasilkan dengan elektrolisis. Halogen, salt-former yang bekerja sama dengan logam, mereka juga punya kongsi asam Halida (HX). Mereka berkorporasi dengan Hidorgen dan Oksigen membentuk asam oksi (HXO), kecuali Fluor.Mereka semua sama-sama spesial.