ⓜ Neptune’s First Birthday
And then I wrote… in 2011, the planet Neptune had completed one full orbit around the Sun from the time when it was first discovered, and a small magazine called Argentus, edited by a friend of mine, Steve Silver, invited a number of astronomers to submit articles in its honor. You can see the resulting special issue here, on line. My contribution was to conduct an interview with Dr. Heidi Hammel, who is one of the world’s leading experts on the outer planets… and someone I have known since we were at MIT together, a… few… years ago. Here’s the interview: Planet Neptune was discovered on September 23, 1846, by the Berlin Observatory astronomers Johann Galle and Heinrich D’Arrest. They had famously been informed by the French astronomer Urbain Le Verrier that calculations of the perturbations in the orbit of Uranus suggested a planet could be found in a particular spot of the sky; when Galle and D’Arrest pointed their … Continue reading →