Activity Quote by Carolyn Porco

I think that, a lot of times, people have this idea that the solar system is entirely explored, that we have sent spacecraft to…

— Carrie Nugent

Planetary missions are great, but they're usually only brief snapshots of those planets and also really very close-up.

— Heidi Hammel

One of the first thoughts I had, when doing early exoplanet research, was that Earth and its many companions seemed very different from the…

— Debra Fischer

Each year, thousands of UFOs are sighted and reported, which is an impressive tally of unidentified aerial phenomena. Surveys show that roughly one-third of…

— Seth Shostak

It feels great to discover a planet, just like any discovery in science, except that it has more of the feel of exploration -…

— Dimitar Sasselov

Of all celestial bodies within reach or view, as far as we can see, out to the edge, the most wonderful and marvellous and…

— Lewis Thomas

There must be enormous numbers of planets around the stars in the many galaxies in our observable universe. We may be sure that wonderful…

— Jim Peebles

Ever since the environmental movement was sparked by photos of the whole Earth taken by astronauts onboard Apollo Lunar Modules, I've seen planetary exploration…

— David Grinspoon

We may have a tacit understanding of how our solar system works, but watching the sun disappear behind the moon reminds us of the…

— Jenna Wortham

Ever since there have been people, there have been explorers, looking in places where other hadn't been before. Not everyone does it, but we…

— Neil deGrasse Tyson

For all I know we may be visited by a different extraterrestrial civilization every second Tuesday, but there's no support for this appealing idea.…

— Carl Sagan

The type of UFO reports that are most intriguing are close-range sightings of machinelike objects of unconventional nature and unconventional performance characteristics, seen at…

— James E. McDonald