Observing

1. This Week’s Sky at a Glance, July 20 – 28

     Comet PanSTARRS, C/2017 S3, has unexpectedly brightened to about 8th magnitude. It awaits your scope, or maybe even big binoculars, up in the northeastern sky before the beginning of dawn. See Bob King's article and finder charts: PanSTARRS Comet, Rocked by Outburst, Goes Green . Friday, July 20 • The waxing gibbous Moon shines over Jupiter this evening, as shown here. Left of Jupiter by just 2° is the […]

   The post This Week’s Sky at a Glance, July 20 – 28 appeared first on Sky & Telescope.

2. PanSTARRS Comet, Rocked by Outburst, Goes Green

   Comet PanSTARRS (C/2017 S3) has erupted again! Now bright enough to see in binoculars, it might become a naked-eye object if it survives until perihelion.

   The post PanSTARRS Comet, Rocked by Outburst, Goes Green appeared first on Sky & Telescope.

3. This Week’s Sky at a Glance, July 13 – 21

     Friday, July 13 • Cassiopeia is now well past its annual bottoming out due north. Look for its W pattern climbing low in the north-northeast after dark. The farther north you live, the higher it will be. Saturday, July 14 • As twilight fades, see if you can catch the Moon over Mercury very low in the west, well to the lower right of Venus as shown here. Your […]

   The post This Week’s Sky at a Glance, July 13 – 21 appeared first on Sky & Telescope.

4. Observers Anxious for Dust to Settle as Mars Opposition Approaches

   With opposition only weeks away, will the current global dust storm finally break? We look at the prospects.

   The post Observers Anxious for Dust to Settle as Mars Opposition Approaches appeared first on Sky & Telescope.

5. Don’t Miss Aldebaran’s Last Occultation Till 2033

   The last and one of the most picturesque occultations of Aldebaran by the Moon happens on Tuesday morning, July 10. Catch it or wait 15 years for the next!

   The post Don’t Miss Aldebaran’s Last Occultation Till 2033 appeared first on Sky & Telescope.