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Sky at the glance

The essential guide to astronomy
This Week’s Sky At a Glance – Sky & Telescope
  1. The Moon waxes through first quarter to gibbous this week, passing Jupiter and Saturn along the way. And by the end of twilight, Jupiter-bright Mars glares low in the east. It's big, bold, and almost at opposition!

    The post This Week's Sky at a Glance, September 25 – October 3 appeared first on Sky & Telescope.

  2. Jupiter and Saturn continue shining nearly level in the south at dusk. Meanwhile, the stars show the changing of the seasons: Just after nightfall, Cassiopeia has climbed higher in the northeast than the Big Dipper has sunk in the northwest.

    The post This Week's Sky at a Glance, September 18 – 26 appeared first on Sky & Telescope.

  3. Vega passes the zenith in late twilight. Vega is bigger, hotter, and 50 times brighter than our Sun. But at a distance of 25 light-years, it's 1.6 million times farther away.

    Jupiter and Saturn still dominate the south at dusk. And fiery Mars, close and almost Jupiter-bright, rises in the east around the end of twilight. It's at its highest and telescopic best in the south around 3 a.m. daylight-saving time.

    The post This Week's Sky at a Glance, September 11 – 19 appeared first on Sky & Telescope.

  4. Mars is big, bright and close as it nears opposition! It nears the gibbous Moon this weekend.

    The post This Week's Sky at a Glance, September 4 – 12 appeared first on Sky & Telescope.

  5. Betelgeuse is dimming again. . . somewhat. After its historic fade last winter to magnitude +1.6, Orion's red supergiant Betelgeuse fully recovered, to +0.4, before it disappeared into the sunset for the season. But now as it emerges low in the east before dawn, it seems to have faded back down to about +0.9. However, […]

    The post This Week's Sky at a Glance, August 28 – September 5 appeared first on Sky & Telescope.