Author Archives: Alan MacRobert

About Alan MacRobert

Sky & Telescope senior editor Alan MacRobert has been covering all aspects of astronomy since 1982.

This Week's Sky at a Glance logo

This Week’s Sky at a Glance, May 26 – June 3

  Friday, May 26 • While twilight is still bright, can you catch the thin crescent Moon just above the west-northwest horizon? The Moon is only about 1¼ days old as seen at the time of dusk for North America (because new Moon was at 3:44 p.m. EDT yesterday the 25th). And, how about little…

This Week's Sky at a Glance logo

This Week’s Sky at a Glance, May 5 – 13

  Friday, May 5 • Above the Moon tonight is Leo's tail star, Denebola (by about a fist at arm's length). Far to the Moon's lower left at dusk is bright Jupiter, with Spica farther on, as shown here. Saturday, May 6 • The Moon tonight forms a gently curving arc with, to its lower…

2013 Astronomy Day celebration in Boston

Spring Astronomy Day 2017!

Amateur astronomy clubs, planetariums, science museums, and parks celebrate Astronomy Day twice a year, when the public is invited to come learn about the sky and view through telescopes.

Supernova 1987A remnant, medium field

Happy 30th Birthday, Supernova 1987A

The first naked-eye supernova since the invention of the telescope lit up the global astronomy world on the morning of February 23, 1987, as news spread by phone and teletype. Supernova 1987A in the Large Magellanic Cloud eventually reached magnitude 2.9, before beginning a long fade and a cascade of unexpected developments that continues to…