Predictions about when we might discover an alien signal from an intelligent civilization remain accurate, according to ...

Over the last century, our understanding of the evolution of stars has improved dramatically. By studying the cosmos, we have ...

The famous “Pale Blue Dot” is a photograph of Earth taken Feb. 14, 1990, by Voyager 1 at a distance of 3.7 billion miles. (Courtesy of NASA) The famed astrophysicist Carl Sagan and former ...

The famed astrophysicist Carl Sagan and former President Jimmy Carter ... raising concerns of global warming in Congress. In 2025, the earth’s existence might be jeopardized if incoming ...

The Carl Sagan Center for Research (CSC) brings together all the scientific research at the ... Research at the CSC focuses on a wide set of disciplines ranging from observing and modeling the ...

“To me, the Voyager Golden Record is a beautiful example of humanity and striving for world peace,” adds propulsion engineer ...

Carl Sagan, the astronomer ... because otherwise the Earth would be awash in aliens. I can think half a dozen ways in which we could not be awash in time travelers, and still time travel is ...

Carl Sagan spent his childhood immersed in Mars ... of color—Burroughs’s Mars had two more primary colors than Earth—with removable heads but decidedly human forms.

Carl Sagan told us that there are more stars in the universe than there are grains of sand on all of the Earth's beaches. At the same time, there are more H 2 O molecules in just 10 drops of water ...

Astronomer and astrophysicist Frank Drake designed the map, working with fellow astronomer Carl Sagan and artist and ... how fast it spins and flashes. On Earth, we’d use one second as the ...