Could there have been an advanced civilization that walked the Earth millions or even billions of years ago, and then died out long ago, their technology and structures lost to the eons? More at #365DaysOfAstro
Why do we think the solar system might have another planet? Why do we think it doesn’t? How do test for something that’s too far away to see? I discuss these questions and more in today’s Ask a Spaceman!
Update from beyond the solar system! Is the universe closed?What’s the different between an asteroid and a dwarf planet?
Things used to be so simple. Comets were snowballs from the outer Solar System, and asteroids were rocks from the inner Solar System. But now everything’s all shades of grey. Astronomers have found asteroids that behave like comets and comets that behave like asteroids.
Imagine a world that is so far from our Sun that it receives less than 1/5,000 of the heat and light that makes our life possible.
Time for astronomy round up and September skyguide with @AwesomeAstroPod at #365DaysOfAstro.
Imagine how humans will colonize the inner Solar System, becoming a true spacefaring civilization. #365DaysofAstro
Living Underground on Other Worlds. Exploring Lava Tubes. #365DaysOfAstro
Live from the AstroTours All-Stars Party, Exploring Titan, Life in the solar system.
We learned how to figure out the ages of objects in the Solar System, now we push out into the deeper Universe. What about stars, galaxies, and even the Universe itself? How old is it?