Quotes About Time

In an unchanging universe a beginning in time is something that has to be imposed by some being outside the universe;

Our subjective sense of the direction of time, the psychological arrow of time, is therefore determined within our brain by the thermodynamic arrow of time. Just like a computer, we must remember things in the order in which entropy increases. This makes the second law of thermodynamics almost trivial. Disorder increases with time because we measure time in the direction in which disorder increases. You can't have a safer bet than that!

Na teoria da relatividade, não existe tempo absoluto único; em vez disso, cada indivíduo tem sua própria medida de tempo, que depende de onde ele se encontra e de como está se movendo.

we can really be sure of is that even if the universe is going to recollapse, it won't do so for at least another ten thousand million years, since it has already been expanding for at least that long. This should not unduly worry us: by that time, unless we have colonized beyond the Solar System, mankind will long since have died out, extinguished along with our sun!

Aprovechemos cada momento. Actuemos ahora mismo.

The role played by time at the beginning of the universe is, I believe, the final key to removing the need for a grand designer and revealing how the universe created itself.

people don't seem too worried about a possible end twenty billion years in the future. You can do quite a lot of eating, drinking and being merry before that.

Even worse, if determinism breaks down, we can't be sure of our past history either. The history books and our memories could just be illusions. It is the past that tells us who we are. Without it, we lose our identity.

As far as we are concerned, events before the big bang can have no consequences, so they should not form part of a scientific model of the universe. We should therefore cut them out of the model and say that time had a beginning at the big bang.

Debemos luchar para que cada mujer y cada hombre tengan la oportunidad de vivir vidas sanas y seguras, con oportunidades y amor. Todos somos viajeros en el tiempo, viajamos juntos hacia el futuro. Trabajemos unidos para construir ese futuro, un lugar que nos guste visitar. Seamos valientes, curiosos, decididos, superemos las dificultades. Se puede conseguir.

Namun teori relativitas memaksa kita mengubah secara mendasar gagasan kita mengenai ruang dan waktu. Kita harus menerima bahwa waktu tidak sepenuhnya terpisah dari ruang, tapi malah berpadu dengan ruang untuk membentuk objek bernama ruang-waktu (space-time).

It is a matter of common experience that things get more disordered and chaotic with time.

Dalam teori relativitas tidak ada waktu mutlak yang unik; tiap individu punya pengukuran waktu sendiri yang bergantung kepada tempat dan cara kerjanya.

Teori relativitas umum Einstein menyiratkan bahwa alam semesta harus punya permulaan dan, mungkin akhir.

Gagasan bahwa kita bisa berjalan mengelilingi alam semesta dan kembali ke tempat semula itu cocok dijadikan fiksi sains, tapi tidak punya banyak arti praktis karena bisa ditunjukkan bahwa alam semesta keburu runtuh menjadi berukuran nol sebelum kita bisa kembali ke titik awal. Kita perlu bergerak lebih cepat daripada cahaya agar bisa sampai ke titik awal sebelum alam semesta berakhir—dan itu tak diperbolehkan!

Stephen Hawking

Banyak orang tak suka gagasan bahwa waktu punya permulaan, barangkali karena terkesan melibatkan campur tangan Ilahi.

What came before the Big Bang? According to the no-boundary proposal, asking what came before the Big Bang is meaningless—like asking what is south of the South Pole—because there is no notion of time available to refer to. The concept of time only exists within our universe.

En consecuencia, si solo sabemos lo que ha sucedido desde el big bang, no podemos determinar lo que sucedió antes. Para nosotros, los sucesos anteriores al big bang no pueden tener consecuencias, de modo que no deberían formar parte de un modelo científico del universo. Por eso deberíamos eliminarlos del modelo y decir que el tiempo tuvo un comienzo en el big bang.

El pasado nos dice quién somos; sin él, perdemos nuestra identidad.

we shall see, the concept of time has no meaning before the beginning of the universe.

in a famous paper in 1905, a hitherto unknown clerk in the Swiss patent office, Albert Einstein, pointed out that the whole idea of an ether was unnecessary, providing one was willing to abandon the idea of absolute time.

This means that at earlier times objects would have been closer together. In fact, it seemed that there was a time, about ten or twenty thousand million years ago, when they were all at exactly the same place and when, therefore, the density of the universe was infinite.

In the theory of relativity, if one can travel faster than light, one can also travel back in time, and this would lead to problems with people going back and changing the past. One would also expect to have already seen large numbers of tourists from the future, curious to look at our quaint, old-fashioned ways.