Quotes from Stephen Hawking

The laws of physics demand the existence of something called 'negative energy'.

At some point during our 13.8 billion years of cosmic history, something beautiful happened. This information processing got so intelligent that life forms became conscious. Our universe has now awoken, becoming aware of itself. I regard it a triumph that we, who are ourselves mere stardust, have come to such a detailed understanding of the universe in which we live.

Remember to look up at the stars and not down at your feet. Try to make sense of what you see and wonder about what makes the universe exist. Be curious. And however difficult life may seem, there is always something you can do and succeed at. It matters that you don't just give up. Unleash your imagination. Shape the future.

if one neglected pressure, a uniform spherically systematic symmetric star would contract to a single point of infinite density. Such a point is called a singularity.

in the last 10,000 years or so we have been in what might be called an external transmission phase. In this, the internal record of information, handed down to succeeding generations in DNA, has changed somewhat. But the external record—in books and other long-lasting forms of storage—has grown enormously.

Unless we have a totalitarian world order, someone will design improved humans somewhere.

A black hole is a region where gravity is so strong that light cannot escape.

Why are we so worried about artificial intelligence? Surely humans are always able to pull the plug? People asked a computer, "Is there a God?" And the computer said, "There is now," and fused the plug.

His feelings were summed up in his dictum "God does not play dice." But all the evidence is that God is quite a gambler. The universe is like a giant casino with dice being rolled, or wheels being spun, on every occasion.

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.

Newton sangat khawatir dengan tiadanya posisi mutlak atau yang disebut ruang mutlak (absolute space), karena tidak cocok dengan gagasannya mengenai Tuhan yang mutlak. Dia malah menolak menerima ketiadaan ruang mutlak, walau hukumnya sendiri menyatakan demikian.

Creo que los virus informáticos deberían ser considerados como vida. Quizás dice algo sobre la naturaleza humana que la única forma de vida que hemos sido capaces de crear hasta ahora sea puramente destructiva.

black hole has a boundary called the event horizon. It is where gravity is just strong enough to drag light back and prevent it from escaping.

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).

If you fall towards a black hole feet first, gravity will pull harder on your feet than your head, because they are nearer the black hole. The result is that you will be stretched out lengthwise, and squashed in sideways. If the black hole has a mass of a few times our Sun, you would be torn apart and made into spaghetti before you reached the horizon.

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.

Trump now exerting new forces in relation to immigration and the development of education

Thus the very fact that we exist as beings that can ask the question "Why is the universe the way it is?" is a restriction on the history we live in. It implies it is one of the minority of histories that have galaxies and stars. This is an example of what is called the Anthropic Principle. The Anthropic Principle says that the universe has to be more or less as we see it, because if it were different there wouldn't be anyone here to observe it.

And one final point - we never really know where the next great scientific discovery will come from, nor who will make it. Opening up the thrill and wonder of scientific discovery, [...], greatly increases the chances of finding and inspiring the new Einstein. Wherever she might be.

Yet for each mind to achieve its full potential, it needs a spark. The spark of enquiry and wonder. Often that spark comes from a teacher.

If] there were such a God, I would like to ask however did he think of anything as complicated as M-theory in eleven dimensions.

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!