October’s sky is full of motion. Saturn reaches opposition on October 4, the Orionid meteor shower peaks on October 21-22, and the Moon sweeps past the Pleiades on October 27-28. NASA’s Jet Propulsion Laboratory rounds up the highlights, and the schedule rewards early risers and late-night watchers alike.
Saturn at Opposition
On October 4, Saturn passes opposition, a point when Earth sits between the Sun and the ringed world. At that moment, Saturn appears directly opposite the Sun in the sky, rising around sunset and remaining visible through most of the night.
The planet is also making headlines for its atmosphere. Astronomers have tracked a hexagon-shaped jet stream stretching nearly 20,000 miles across Saturn’s north pole for years. More recently, observations from NASA’s Hubble Space Telescope found a ten-sided atmospheric wave surrounding Saturn’s south pole. That feature appears to be growing stronger, giving researchers a rare chance to watch a massive atmospheric structure develop.
Orionids Rise With Halley’s Comet Debris
The Orionid meteor shower peaks during the night of October 21 into the morning of October 22. These meteors come from small pieces of material left behind by Halley’s Comet. They don’t just come from one spot in the sky — individual meteors can flash across any part of the sky, even though they appear to come from the direction of the constellation Orion.
This year’s display will suffer from a bright waxing gibbous Moon, which will overwhelm some of the fainter meteors. The best time to watch arrives during the few hours before dawn, when the Moon has already set.
To see the night sky at its best, NASA advises going to a spot free from bright lights, giving your eyes time to get used to the darkness, and looking over as wide an area of the sky as you can.
The Moon Passes the Seven Sisters
On the night of October 27 into the 28th, the Moon will meet the Pleiades star cluster, also called the Seven Sisters. Stories about the Pleiades have appeared in many ancient cultures, and their wide visibility helps explain why — the cluster can be seen from nearly every part of the world.
A casual glance shows the cluster as a faint gathering of 6 to 7 stars. The best time to see it is during the evening when the Moon and the Pleiades rise higher in the eastern sky. While no special equipment is needed to spot it, binoculars or a telescope show the cluster with far more detail.
What to See When
| Event | Date | Best Viewing |
|---|---|---|
| Saturn at opposition | October 4 | All night, rising at sunset |
| Crescent Moon near Jupiter | October 6 | Before sunrise |
| Orionid meteor shower | October 21-22 | Before dawn after moonset |
| Moon near Pleiades | October 27-28 | Evening through morning |
The Full Schedule
- Saturn at opposition on October 4
- A thin crescent Moon appears close to bright Jupiter on October 6
- The Orionid meteor shower peaks on October 21-22
- The Moon passes near the Pleiades on October 27-28
Why This Month Matters
One month can deliver three significant celestial events, and doing so counts as a solid showing. The Orionids provide a dependable meteor display, while the Pleiades stand among the most recognizable star clusters visible at night. Saturn reaching opposition supplies the focal point for the trio.
Saturn’s south-pole wave has been watched by scientists grow, and their observations add to our understanding of the planet. Seeing such a feature develop is unusual.
The Moon stands as the sole impediment to viewing the Orionid display, though its presence will brighten the show. Yet the schedule serves observers well, since the peak Orionids arrive before dawn.
Set an alert for yourself: October brings oppositions, showers, and near passes.
See the video the story is built around at ScienceDaily.
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