For centuries, humans have wondered, Are we alone? and What is the universe made of? Scientists will tackle these exact questions in two documentaries, part of the new, six-episode PBS series "Nova Wonders."
On May 3, 1986, NASA attempted to launch a new weather satellite called GOES-G for the National Oceanic and Atmospheric Administration, but the rocket malfunctioned in mid-air. See how it happened in our On This Day In Space video series.
On May 1, 1949, Neptune's moon Nereid was discovered by the Dutch astronomer Gerard Kuiper. This was the second of 14 moons discovered at Neptune. See how it happened in our On This Day In Space video series.
Thinking that the earth might be flat appears to have grown in popularity in recent years. Indeed, flat earthers are gathering for their annual conference this year in Birmingham, just two miles from my own university.
On April 27, 1961, NASA launched Explorer 11, a satellite that contained the first gamma ray telescope to go to space. This marked the birth of space-based gamma ray astronomy. See how it happened in our On This Day In Space video series.