Gregory Benford Quotes

The Moon is a ball of left-over debris from a cosmic collision that took place more than four billion years ago. A Mars-sized asteroid - one of the countless planetesimals that were frantically churning our solar system into existence - hit the infant Earth, bequeathing it a very large natural satellite.

Consider that the overwhelming majority of those 40,000 near-Earth asteroids are small enough to fit on the parking lot at the mall. And while these rocky runts won't cause Armageddon, they could still flatten such popular hominid hangouts as Manhattan or downtown Des Moines.

Our planet doesn't seem to be the result of anything very special.

Americans who read the papers or watch Jay Leno have been aware for some time now that there is a slim but real possibility - about 1 in 45,000 - that an 850-foot-long asteroid called Apophis could strike Earth with catastrophic consequences on April 13, 2036.

The chances that your tombstone will read 'Killed by Asteroid' are about the same as they'd be for 'Killed in Airplane Crash.'

If you get asteroids about a kilometer in size, those are large enough and carry enough energy into our system to disrupt transportation, communication, the food chains, and that can be a really bad day on Earth.

It would take an extremely large spacecraft to deflect a large asteroid that would be headed directly for the Earth.

Most estimates of the mortality risk posed by asteroid impacts put it at about the same risk as flying in a commercial airliner. However, you have to remember that this is like the entire human race riding the plane - it is one of the few risks that really could wipe us all out.

What if an asteroid were to strike planet Earth? What could we possibly do to prevent it? However many guys we have working on this problem, it can't possibly be enough.

The chunks of comet Shoemaker-Levy 9 were so large, and were moving so fast, that each hit Jupiter with at least the equivalent energy of the dinosaur-killing collision between Earth and an asteroid 65 million years ago. Whatever damage Jupiter sustained, one thing is for sure: it's got no dinosaurs left.

Asteroids have hit the Earth millions of times. We can see them as shooting stars every night. When they get bigger, things get complicated. It is only a matter of time until a big one hits us. And since we can do something about it, we should.

They say asteroids hit the moon pretty often, which is how the moon gets its crater, but this one is going to be the biggest asteroid ever to hit it and on a clear night you should be able to see the impact when it happens, maybe even with the naked eye but certainly with binoculars. They made it sound pretty dramatic, but I still don't think it's worth three homework assignments.

On 24 October 1944 Planet Earth was following its orbit about the sun as it has obediently done for nearly five billion years.

The squares of the periodic times are proportional to the cubes of the mean distances from the sun.

In the short term, some deadly virus might be more important, but in the long run there is hardly anything more important than asteroids.

Consider now the Milky Way. Here also we see an innumerable dust, only the grains of this dust are no longer atoms but stars; these grains also move with great velocities, they act at a distance one upon another, but this action is so slight at great distances that their trajectories are rectilineal; nevertheless, from time to time, two of them may come near enough together to be deviated from their course, like a comet that passed too close to Jupiter. In a word, in the eyes of a giant, to whom our Suns were what our atoms are to us, the Milky Way would only look like a bubble of gas.

The industrial revolution fueled all of humanity, everything we do has been exploding ever since. It's been the biggest most impacting thing, not only for human beings in the last 250 million years, but also the planet, which caused the ice age, which buried the forest. It's this circle because of the industrial revolution, it's neither good or bad, it enabled all of modernization, extended our life, it changed everything. It's the most impactful thing that happened to the planet and the people.

The mathematical thermology created by Fourier may tempt us to hope that, as he has estimated the temperature of the space in which we move, me may in time ascertain the mean temperature of the heavenly bodies: but I regard this order of facts as for ever excluded from our recognition. We can never learn their internal constitution, nor, in regard to some of them, how heat is absorbed by their atmosphere. We may therefore define Astronomy as the science by which we discover the laws of the geometrical and mechanical phenomena presented by the heavenly bodies.

If the man who observes the myriad stars, and considers that they and their innumerable satellites move in their serene dignity through the heavens, each swinging clear of the other's orbit-if, I say, the man who sees this cannot realise the Creator's attributes without the help of the book of Job, then his view of things is beyond my understanding.

Donald Trump isn't doing anyone any favors by running to be the most powerful person on the planet, right?

I therefore concluded, and decided unhesitatingly, that there are three stars in the heavens moving about Jupiter, as Venus and Mercury about the Sun; which at length was established as clear as daylight by numerous other observations.

Skin was earth; it was soil. I could see, even on my own skin, the joined trapezoids of dust specks God had wetted and stuck with his spit the morning he made Adam from dirt. Now, all these generations later, we people could still see on our skin the inherited prints of the dust specks of Eden.

...from the same principles, I now demonstrate the frame of the System of the World.

Two years ago, China tested an anti-satellite weapon that actually caused quite a bit of controversy and one of the controversies is that by blowing up a satellite, you are creating more space debris which is a hazard to satellites and spacecraft in lower Earth orbit and if they had been a partner, you'd have to do an experiment, and if they had been a partner in the international space station, would they have really done that test? They would have really thought twice about creating that tension between the countries and potentially endangering a project that they were a part of.

My aim is to say that the machinery of the heavens is not like a divine animal but like a clock (and anyone who believes a clock has a soul gives the work the honour due to its maker) and that in it almost all the variety of motions is from one very simple magnetic force acting on bodies, as in the clock all motions are from a very simple weight.