alvindzzzcino...

tastysynapse: 52. PHIL PLAIT: Welcome to science

Tue, 02 Oct 2012 17:39:31 +0700

tastysynapse:

52. PHIL PLAIT: Welcome to science

Photo

Tue, 02 Oct 2012 17:36:19 +0700

expose-the-light: 10 Things You Didn’t Know About Black...

Sun, 22 Jul 2012 11:11:27 +0700

expose-the-light:

10 Things You Didn’t Know About Black Holes

Stars whose size is 10 or 15 times as massive as the Sun, generally have a fate of becoming black holes. Small stars, however, die as white dwarfs or neutron stars. So how do large stars become black holes? As stars begin to grow old, they gradually expand and they slowly run out of their supply of hydrogen and then helium. This causes contraction of their cores and expansion of the outer layers. The stars start becoming cooler and less bright and they come to a stage which is known as the red giant phase. Now, for a star which is even 3 times or more the mass of the Sun, undergoes detonation (a violent release of energy caused by a chemical or nuclear reaction) in cataclysms known as supernovae. Such kind of explosion results in scattering of most of a star into the space. However, it also leaves behind a cold remnant of the star, which is no longer able to execute any nuclear fusion reaction.

As there is no fusion in the dead remnants of a massive supernova star, there is no creation of any energy which can oppose the inward pull of gravity caused by the star’s own mass. Thus, the star enters a phase where it begins to collapse in upon itself. This is the formation of the black hole, wherein, it starts shrinking to zero volume. So, with volume being zero, density becomes infinite, so much that even light becomes unable to escape its massively strong gravitational pull. As a result of this, even the light of the dead remnants of the star gets trapped in its orbit and this dark star evolves to become what is known as a black hole.

It has been estimated that there might be black holes of enormous size, which may be existing at the center of our galaxy, ‘The Milky Way’. These holes are assumed to be having the mass of 10 - 100 billion suns. Now, that is something which is ‘HUGE’, in block letters!

Cygnus X-1 is the black hole that is located about 8000 light years away from our planet Earth. This is the closest black hole to Earth, known to man.

Although, black holes are associated with the reputation of having the strongest suction force, they do not bear the capability to absorb the whole universe. Anything such as planets, light and other matter, can be pulled into the grasp of black holes, only if they happen to cross what is known as the event horizon. The radius of this event horizon is known as the Schwarzschild radius and at this radius, the escape velocity equals the speed of the light. So, once an object has passed through it, it must travel faster than light in order to escape it. That is the reason why, even light cannot escape the event horizon of a black hole.

As mentioned earlier, in this part of black holes in space, only the largest of stars are capable to end up as black holes. Only these stars are massive enough to get compressed to the Schwarzschild radius. While, smaller stars end up as white dwarfs or neutron stars.

There are several black holes which exist in binary star systems. Stars which are neighboring such holes, will keep on shrinking as their mass will continually be pulled by these holes. Gradually, the black holes will go on increasing, until the other stars have vanished.

As light cannot escape from a black hole, it cannot be directly observed. However, scientists use the presence of matters which swirl around the hole. Such matters are usually gas and dust and they heat up and emit radiation which can be detected.

Talking about our Sun becoming a black hole, the phenomenon won’t occur. This is because the sun is not massive enough to shrink into a black hole. However, it will end up to become a white dwarf, after several billion years.

The center of a black hole is void of time and space.

A giant elliptical galaxy in the constellation Virgo, is assumed to home the largest known black hole. This hole is about 3 billion times the mass of the Sun.

Larger black holes are known to suck up other smaller ones which are close to their vicinity.

No matter, how many facts people come up with, black holes represent an endless journey in the vast darkness of the space. The concept which lay hidden in the lap of black holes, perhaps, is the most appropriate analogy to the saying ‘sky is the limit!’

In the image: Simulation of gas cloud approaching the black hole at the center of the Milky Way

Welcome Ramadhan 1432 H

Sat, 21 Jul 2012 05:29:42 +0700

Welcome Ramadhan 1432 H

havefaithandhope: I created a group blog it’s called ‘Everyone...

Fri, 20 Jul 2012 02:29:45 +0700

havefaithandhope:

I created a group blog it’s called ‘Everyone Needs Inspiration’ I want this group to be a group you click on when you need someone to talk to; for great, honest advice from great amazing, honest people. We will always help one another and we will always leave this group with a smile.

I am currently looking for new TEN to FIFTEEN members to start off with and I don’t know who to decide to be in the group as I want it to be fair!

You’re probably wondering what do we do in this group?

We will help each other reach goals;

Help each other within polls;

Help each other gain followers;

Help each other with advice;

Be there for one another;

Inspire one another;

Get to know one another;

SO? How can we be in this group?

REBLOG/LIKE this post (whatever it takes to make you MORE noticed).

Must be following: havefaithandhope or you will NOT be considered.

I than will BE fair and RANDOMIZE the blogs (gives EVERYONE a fair enough chance).

I really wanna choose as soon as possible, so get reblogging loves!

Photo

Thu, 12 Jul 2012 11:30:33 +0700

dialogue

Mon, 11 Jun 2012 11:49:14 +0700

Manusia Bertanya : Bolehkah aku frustrasi ?

Qur'an Menjawab : Janganlah kamu bersikap lemah, dan janganlah (pula) kamu bersedih hati, padahal kamulah orang-orang yang paling tinggi (derajatnya), jika kamu orang-orang yang beriman. (Ali Imraan : 139)

Manusia Bertanya : Kenapa aku diberi ujian seberat ini?

Qur'an Menjawab : Allah tidak membebani seseorang melainkan sesuai dengan kesanggupannya………. (Al-Baqarah : 286)

Manusia Bertanya : Kenapa aku tidak diuji saja dengan hal-hal yang baik ?

Qur'an Menjawab : ………. boleh jadi kamu membenci sesuatu, padahal ia amat baik bagimu, dan boleh jadi (pula) kamu menyukai sesuatu padahal ia amat buruk bagimu; Allah mengetahui, sedang kamu tidak mengetahui. (Al-Baqarah : 216)

Manusia Bertanya : Kenapa aku diuji ?

Qur'an Menjawab : Apakah manusia itu mengira bahwa mereka dibiarkan (saja) mengatakan:"Kami telah beriman", sedang mereka tidak diuji lagi? (Al-Ankabuut : 2). Dan sesungguhnya Kami telah menguji orang-orang sebelum mereka, maka sesungguhnya Allah mengetahui orang-orang yang benar dan sesungguhnya Dia mengetahui orang-orang yang dusta. (Al-Ankabuut : 3)

Manusia Bertanya : Bolehkah aku berputus asa ?

Qur'an Menjawab : ………..dan jangan kamu berputus asa dari rahmat Allah. Sesungguhnya tiada berputus asa dari rahmat Allah, melainkan kaum yang kafir. (Yusuf : 87)

Manusia Bertanya : Bagaimana cara menghadapi ujian hidup ini?

Qur'an Menjawab : Hai orang-orang yang beriman, bersabarlah kamu dan kuatkanlah kesabaranmu dan tetaplah bersiap siaga (di perbatasan negerimu) dan bertaqwalah kepada Allah supaya kamu beruntung. (Ali Imraan : 200)

Manusia Bertanya : Bagaimana menguatkan hatiku?

Qur'an Menjawab : ….Cukuplah Allah bagiku; tidak ada Tuhan selain Dia. Hanya kepada-Nya aku bertawakal……. (At-Taubah : 129)

Manusia Bertanya : Apa yang kudapat dari semua ujian ini?

Qur'an Menjawab : Sesungguhnya Allah telah membeli dari orang-orang mu'min, diri dan harta mereka dengan memberikan surga untuk mereka………. (At-Taubah : 111)

SUBHANALLAH, sangat menyejukan hati.

myodos: Double exposure series (so far) I have more photos but...

Wed, 09 May 2012 20:18:03 +0700

myodos:

Double exposure series (so far)

I have more photos but didn’t want to make a huge photoset. So I am entering these photos and a few other of my photos into this contest, I never entered my work into any contests before and the prize seemed well worth my $50 admission fee

If you think I diserve it, please click here to be redirected to my profile for the contest and at the top where it says “Collect me”, please click that! Thats all you must do! And if you could, reblog this post! I would really appreciate this a lot you guys.

mapmeoblivion: Glass Microbiology by Luke Jerram

Tue, 08 May 2012 11:09:41 +0700

mapmeoblivion:

Glass Microbiology by Luke Jerram

"It’s not that we are better than the universe, we are part of the universe. We are in the universe..."

Thu, 03 May 2012 23:18:44 +0700

““It’s not that we are better than the universe, we are part of the universe. We are in the universe and the universe is in us.””

- Neil deGrasse Tyson (via expose-the-light)

fuckyeahmolecularbiology: 6 Things I’ll Bet You Didn’t Know Are...

Thu, 03 May 2012 22:26:38 +0700

fuckyeahmolecularbiology:

6 Things I’ll Bet You Didn’t Know Are In Your DNA

In biology, DNA is presented as a neat, orderly double helix comprised of nucleotides, which determine our genotype and - along with environmental factors - our phenotype. Unfortunately, the DNA replicating in our cells right now isn’t comprised of the perfect right-handed spirals that we picture as the “building blocks of life” - in the words of Cracked.com, “[it] is more like an old scrapbook that someone has torn up, pasted back together, filled with old newspaper clippings about murder and then taken into the bathroom with them.”

So let’s take a look at the creepiest of what scientists think 98% of our DNA - as in, not the approximately 2% that codes for useful proteins - is made up of.

Ancient Viruses. I’ve blogged about this before, but it’s so cool I’ll mention it again. While a “normal” virus works by invading a host cell and using cellular machinery to reproduce, retroviruses actually mix their own genetic material into the cell they’re invading. Scientists believe that endogenous retroviruses picked up by our distant ancestors found their way into the sex organs, and the new virus-hybrid DNA was passed onto offspring - which ultimately evolved into us, racking up virus-laden DNA over thousands of years. As a result, scientists estimate we now have 100,000 of these microscopic gate-crashers cluttering up our DNA - making up a whopping 40% of our entire genome. (Edit: As jtotheizzoe pointed out, viral DNA itself only accounts for about 8-10% of the genome, although that’s probably underestimated since a lot of it is hopelessly degraded. The 40% number comes from retrotransposons, like LINE elements, which are not viruses - although they may be ancestors of retroviruses.) Even more eerily, new research suggests there could be a correlation between unexpectedly high levels of a particular endogenous retrovirus and schizophrenia.

“Dead” genes. Our DNA is also full of evolutionary relics that have not yet been completely edited out - so called “junk DNA”, or “dead genes.” There’s just one problem with that name, however - the genes aren’t actually dead. A common form of muscular dystrophy, FSHD, is caused by a “dead” gene present in all humans. But it’s only “dead” because it’s missing one specific sequence that allows it to be successfully transcribed; all it takes is one tiny mutation, and the gene is fully expressed. If you thought that was just a fluke, think again: A gene thought to put people at risk for Crohn’s disease was resurrected after 25 million years, and by what? Another retrovirus, of course!

Neanderthal DNA. How on earth is 1-4% of our modern genome the same as that of a Neanderthal? The obvious answer is, “Oh, it hasn’t been edited out by natural selection yet”…except for, awkwardly enough, that same 1-4% is only found in people with European and Asian descent, and not those descending from Sub-Saharan Africa. Scientists’ hypothesis? Some of our early ancestors got it on in the Middle East 600,000 years ago after leaving Africa. Neanderthals weren’t our only inter-species coital experience, either - in 2010, researchers discovered another species, the Denisovans, and we apparently got funky with them, too.

Your family tree. And, unfortunately, not always in a good way. A study in Sweden revealed a strange pattern in a rural community that had gone through periods of both famine and abundance in the 19th century. The study found that the grandsons of men who’d had childhoods coinciding with abundant years had a life expectancy of 32 years less than the grandsons of those who had experienced famine, with the grandsons’ earlier deaths caused mainly by diabetes and heart disease.

Insect-spread parasites. The assassin bug of South America is well known for sucking the blood of sleeping victims while pooping on their faces at the same time. While this is gross, it doesn’t have any affect on our DNA - until we scratch the bite. That causes the bug faeces to enter our system, carrying the parasite T. cruzi - the cause of Chagas’ disease. Being a discerning and ever-questioning scientist, you’re probably thinking: Hey, wait, that’s not right! That’s not genetic! The scary part is it might be. Researchers who deliberately infected chicken eggs with T. cruzi and then tested the offspring of the infected chickens that emerged found that not only did those chickens have the parasite DNA, but so did their offspring, and so on.

Your Long-Lost Twin. In very rare cases, one of two twins in the womb will end up effectively killing the other in order to obtain more resources and nutrients for itself. In even rarer cases, the surviving twin can end up absorbing its dead twin’s DNA - a condition known formally as “chimerism.” In 2002, a woman named Lydia Fairchild submitted DNA tests for her three children as part of a welfare claim, only to have the results prove that genetically, she wasn’t the mother. Since DNA is considered the gold standard of medical evidence, she was accused of somehow stealing the children, even after the poor woman gave birth to another “nonrelated” child right in front of a social worker. Finally, more extensive testing unlocked the mystery: Her ovaries had a different set of DNA than her bloodstream. In other words, she’d given birth to her dead sister’s children. Hers wasn’t an isolated case, either: a woman getting typed for a kidney transplant found out that two of her sons belonged to a dead sibling, while a teenage boy being treated for an undescended testicle was found to possess an ovary from his dead sister.

Image: Computer simulation of DNA unwinding.

"Science is not a body of knowledge. It’s a way of thinking and querying the world around you."

Fri, 27 Apr 2012 23:50:54 +0700

“Science is not a body of knowledge. It’s a way of thinking and querying the world around you.”

- Neil deGrasse Tyson (via scinerds)

Truth of Creativity ;)

Fri, 27 Apr 2012 14:51:59 +0700

Truth of Creativity ;)

benar sekali…..

Thu, 26 Apr 2012 21:44:34 +0700

benar sekali…..

expose-the-light: Ingredients of life Illustrations of Chemical...

Thu, 26 Apr 2012 04:51:10 +0700

expose-the-light:

Ingredients of life

Illustrations of Chemical compounds by Avkari Alon

"Dear Neptunus, aku mencintainya. Di depannya aku menjadi diriku sendiri. Seperti airmu yang selalu..."

Thu, 26 Apr 2012 02:55:27 +0700

“Dear Neptunus, aku mencintainya. Di depannya aku menjadi diriku sendiri. Seperti airmu yang selalu membawa semua pesanku. Diapun begitu, membuatku hanyut oleh sorot matanya. Membuatku lupa oleh kesederhanaan suaranya. Sampai aku tak bisa katakan apa-apa padanya. Bahkan untuk sekedar bilang, rindu atau butuh. Banyak yang nggak ngerti, lalu terluka, dan saling menyalahkan. Karena itu aku takut berbicara tentang hati. Maka aku tuliskan saja, lalu aku simpan, dan mungkin aku kirimkan ke…. entah kemana.”

- Kugy. Teaser Perahu Kertas.

(via japaneseapple)

Photo

Thu, 26 Apr 2012 02:50:56 +0700