Sunday, August 25, 2013

Big Bang Tidak Terjadi Hanya Pada Satu Titik

Para ilmuwan telah melakukan pengamatan ke Galaksi tetangga dan kemudian mencoba mengukur universe expansion.

Hasil yang diperoleh adalah galaksi manapun yang diamati, semuanya menjauh dari bumi.

Pada gambar terlampir terlihat bahwa galaksi yang segaris lurus dengan bumipun ternyata juga saling menjauh. Semula ini menimbulkan dugaan bahwa bumi adalah pusat alam semesta. Setelah dilakukan penelitian yang lebih mendetail lagi, diperoleh kesimpulan bahwa bumi bukanlah pusat alam semesta, tetapi universe expansion terjadi pada setiap titik di jagad raya ini.


Kesimpulan ini menghasilkan konsekwensi bahwa Big Bang tidak terjadi hanya pada satu titik saja, tetapi terjadi di setiap titik yang ada pada alam ini. Seberapa jauh jarak antara setiap titik itu hanya awloh yang tahu. :p

Kesimpulan ini sangat masuk akal karena kalau Big Bang hanya terjadi pada satu titik saja, dan anggaplah titik Big Bang itu ada pada sebelah kiri gambar, maka Galaksi A, Galaksi B dan bumi seharusnya bergerak pada arah yang sama ( ke kanan) meskipun kecepatan pergerakannya bisa berbeda. Faktanya tidak demikian yang terjadi. Jadi kesimpulan tersebut sangat logis, valid, dan didukung dengan bukti2 yang ada. 

Ini adalah sebagian referensi yang pernah saya baca. Kalau masih penasaran bisa cari sendiri link2 lainnya.   :p

References:
  1. The Big Bang did not occur at a single point in space as an "explosion." It is better thought of as the simultaneous appearance of space everywhere in the universe. That region of space that is within our present horizon was indeed no bigger than a point in the past. Nevertheless, if all of space both inside and outside our horizon is infinite now, it was born infinite. If it is closed and finite, then it was born with zero volume and grew from that. In neither case is there a "center of expansion" - a point from which the universe is expanding away from. In the ball analogy, the radius of the ball grows as the universe expands, but all points on the surface of the ball (the universe) recede from each other in an identical fashion. The interior of the ball should not be regarded as part of the universe in this analogy.
    Source : http://map.gsfc.nasa.gov/universe/bb_concepts.html
    .
  2. The Big Bang did not occur as an explosion in the usual way one think about such things, despite one might gather from its name. The universe did not expand into space, as space did not exist before the universe. Instead, it is better to think of the Big Bang as the simultaneous appearance of space everywhere in the universe. The universe has not expanded from any one spot since the Big Bang — rather, space itself has been stretching, and carrying matter with it.
    Source: http://www.space.com/52-the-expanding-universe-from-the-big-bang-to-today.html
    .
  3. The expansion of the universe is one of the most fundamental concepts of modern science yet one of the most widely misunderstood.
    The key to avoiding the misunderstandings is not to take the term “big bang” too literally. The big bang was not a bomb that went off in the center of the universe and hurled matter outward into a preexisting void. Rather it was an explosion of space itself that happened everywhere, similar to the way the expansion of the surface of a balloon happens everywhere on the surface.
    This difference between the expansion of space and the expansion in space may seem subtle but has important consequences for the size of the universe, the rate at which galaxies move apart, the type of observations astronomers can make, and the nature of the accelerating expansion that the universe now seems to be undergoing.
    Strictly speaking, the big bang model has very little to say about the big bang itself. It describes what happened afterward.
    Source: http://www.mso.anu.edu.au/~charley/papers/LineweaverDavisSciAm.pdf

No comments:

Post a Comment