Tag: galaxies

Sir Martin Rees: Earth in its final century?

Sir Martin Rees: Earth in its final century?

By Micah Moen 100 Comments August 27, 2019

If you take 10,000 people at random, 9,999 have something in common: their interests in business lie on or near the Earth’s surface. The odd one out is an astronomer, and I am one of that strange breed. (Laughter) My talk will be in two parts. I’ll talk first as an astronomer, and then as […]

Universe Size Comparison 3D

Universe Size Comparison 3D

By Micah Moen 100 Comments August 25, 2019

Ceres, 950 km The Moon, 3500 km Callisto, 4800 km Mercury, 4900 km Mars, 6800 km Venus, 12000 Earth, 13000 km (You are Here) Kepler 22b, 30000 km Neptune, 50000 km Uranus, 51000 km Saturn, 120 000 km Jupiter, 140 000 km Proxima Centauri, 200 000 km The Sun, 1.4 Million km Sirius A, 2.5 […]