Alex Steffen

We're not going to persuade people in the developing world to go without, but neither can we afford a planet on which everyone lives like an American. Billions more people living in suburbs and driving SUVs to shopping malls is a recipe for planetary suicide. We can't even afford to continue that way of life ourselves.

American Writer

George Smoot

For many centuries, humans have speculated that there might be planetary systems around other stars and that there could be extraterrestrial life there and even intelligent being. However, those were simply speculations, and now we have evidence for the first part of these ideas.

American Scientist

Nick Sagan

My father was not only a planetary scientist and a great popularizer of science, but he thought very deeply about the world. He was a scholar, he studied history. He taught a class in critical thinking, and he was very, very aware of the directions we might go.

American Novelist

Max Heindel

When we realize that human beings are entering the world constantly and that each being is stamped at the first complete breath with the planetary pattern then in the sky, everyone must necessarily be different from everybody else.

Danish Celebrity

Carolyn Porco

In any 'big science' enterprise, like planetary exploration, where you must work in big teams of similarly driven people, it is important also to know how to work alongside others even when they may be your fiercest competitors.

Graham Hawkes

Space exploration promised us alien life, lucrative planetary mining, and fabulous lunar colonies. News flash, ladies and gents: Space is nearly empty. It's a sterile vacuum, filled mostly with the junk we put up there.

English Designer

Deepak Chopra

There is no fixed physical reality, no single perception of the world, just numerous ways of interpreting world views as dictated by one's nervous system and the specific environment of our planetary existence.

American Speaker

David Grinspoon

I think that an advanced planetary civilization will modify their own planets to be more stable, to prevent asteroid impacts and dangerous climate fluctuations.

Rusty Schweickart

No government in the world today has explicitly assigned the responsibility for planetary protection to any of its agencies.

American Astronaut

Lorne Greene

The world is not the prettiest place in this planetary universe.

Canadian Actor

The term 'planetary' is common in astronomy to describe elements related to planets.

Astronomy Usage

'Planetary' reveals that the subject is treated from a scientific or technical viewpoint.

Scientific Context

'Planetary' as global emphasizes the vast scope or serious impact of an issue or subject.

Global Impact

Using 'planetary' signals that the topic extends beyond local or national boundaries.

Beyond Borders

'Planetary' can refer to the movement and behavior of planetary bodies concerning each other.

Motion Description

'Planetary' is tied to the mechanics of how planets move and are influenced by gravity.

Celestial Mechanics

 and he couldn't quite make out what he was looking at. So he wrote that he had seen -- "I have observed that the furthest planet has three bodies." And this is what he ended up concluding that he saw. So without a theory of planetary rings and with only grainy data, you can't have a good theory.

Why people believe weird...

 In other words, we have possibly stumbled upon the holy grail of modern day planetary exploration, or in other words, an environment that is potentially suitable for living organisms. And I don't think I need to tell you that the discovery of life elsewhere in our solar system,

Carolyn Porco: This is...

 and they look a lot like these microbial tubules we also study impact craters these are observed on every planetary body in the solar system and they're created when an asteroid or comet hits the planet or a moon they have a very destructive reputation but they actually

What does an alien look...

 to support human development as we know it. It's also good news, because the planetary risks we're facing are so large, that business as usual is not an option. In fact, we're in a phase where transformative change is necessary, which opens the window for innovation,

Let the environment...

 these bodies often orbit their own stars, with some being a part of entire planetary systems. Exoplanets are made of the same elements as the world's and our solar system, and based on their composition and structures are just as diverse.

Exoplanets 101 PIPE...

 whether alien civilizations out there in the universe or our own, into three levels based on energy consumption. The tiny amount of energy we currently consume pales next to what we leave untapped. A Type I, or planetary civilization,

Is there a limit to...

 characterized by a nation versus nation very fragile standoff and basically we lived for all those years and some might argue that we still do in a situation of being on the brink literally of an apocalyptic planetary calamity

Surviving a nuclear...

 He developed three brilliant laws of planetary motion while he was studying decades of precise astronomical data in an effort to find support for his theory. While his three laws are still in use today,

What’s the difference...

 F-sub-p is the fraction of stars that have planets. N-sub-e is the average number of habitable planets in any planetary system. F-sub-l is the fraction of planets on which life actually begins

Calculating The Odds of...

 first rocks eventually gravity assembled the rocks to create planetary embryos but in time form the four closest planets to the Sun