Quotes About Universe

One big-brained branch of these mammals, that which we call primates, evolved a genus and species (Homo sapiens) with sufficient intelligence to invent methods and tools of science—and to deduce the origin and evolution of the universe.

So dark matter is our frenemy. We have no clue what it is. It's kind of annoying. But we desperately need it in our calculations to arrive at an accurate description of the universe. Scientists are generally uncomfortable whenever we must base our calculations on concepts we don't understand, but we'll do it if we have to. And dark matter is not our first rodeo.

the universe had a beginning. The universe continues to evolve. And yes, every one of our body's atoms is traceable to the big bang and to the thermonuclear furnaces within high-mass stars that exploded more than five billion years ago.

Our star, and most stars, are made mostly of hydrogen, which is the number one element in the universe: 90% of all atomic nuclei are hydrogen, about 8% are helium, and the remaining 2% comprise all the other elements in the periodic table. All

Cosmologists have plenty of ego. How could you not when your job is to deduce what brought the universe into existence?

If all mass has gravity, does all gravity have mass? We don't know. Maybe there's nothing the matter with the matter, and it's the gravity we don't understand.

Are we missing some basic pieces of the universe that once were? What part of the cosmic history book has been marked access denied? What remains absent from out theories and equations that ought to be there, leaving us groping for answers we may never find?

We do not simply live in this universe. The universe lies within us.

The Physics of Immortality

Personally, I am quite comfortable with chemicals, anywhere in the universe. My favorite stars, as well as my best friends, are all made of them.

But what if the universe was always there, in a state or condition we have yet to identify—a multiverse, for instance, that continually births universes? Or what if the universe just popped into existence from nothing? Or what if everything we know and love were just a computer simulation rendered for entertainment by a superintelligent alien species?

But high-mass stars fortuitously explode, scattering their chemically enriched guts throughout the galaxy. After nine billion years of such enrichment, in an undistinguished part of the universe (the outskirts of the Virgo Supercluster) in an undistinguished galaxy (the Milky Way) in an undistinguished region (the Orion Arm), an undistinguished star (the Sun) was born.

Indeed, the very word "galaxy" derives from the Greek galaxias, "milky.

going through a wormhole or (as we shall see) by going around a cosmic string.

opposite direction of gravity, forcing the universe to expand faster than it otherwise would.

So by looking in X-rays, you are seeing aspects of nature which we did not even suspect existed but which are very important in the formation, evolution, and dynamics of the structures in the universe.

The cosmic perspective is humble.

Al principio, era la física. La

began to think of people not as the masters of space and time but as participants in a great cosmic chain of being

thermal radiation left over from the Big Bang

The cosmic perspective opens our eyes to the universe, not as a benevolent cradle designed to nurture life but as a cold, lonely, hazardous place, forcing us to reassess the value of all humans to one another.

The Coma cluster is also what we call a "relaxed" system. Please resist the image of a group of galaxies kicking back and listening to smooth jazz.

Astrophysics teaches us that we're not the center of the world.

The cosmic perspective enables us to grasp, in the same thought, the large and the small, from a universe that began in a space far tinier than the period at the end of this sentence to one that is now many billions of light-years across.