Astronomical Events of 1990: A Stargazer's Almanac
Take a look back at the astronomical events of 1990, including sunspots, solar flares, Northern Lights, eclipses, meteor showers and comets, and the planetary year.
In 1990 the moon will come as close to Earth as will get for the rest of this century, and we'll witness two full moons in the same month: December.
PHOTO: KATHLEEN NORRIS COOK
In 1990, our sun is expected to enter a period of unusually high activity—perhaps the highest in centuries—producing many sunspots and solar flares.
Sunlight, reaching the moon from the upper left in this illustration, creates its phases: 1) new moon, 2) crescent, 3) first quarter, 4) gibbous, and 5) full. The moon then wanes through the sequence in reverse.
The red planet, Mars, will shine with uncommon brilliance in the night skies this summer and fall.
The Hubble Space telescope may answer the riddle of Neptune's Great Dark Spot.