Algol in Perseus is a famous eclipsing variable. Its brightness drops when one star in the system passes in front of another, creating a predictable dimming that observers can follow over several hours.
NASA’s October 2026 skywatching notes use Algol as an easy seasonal example of a star that visibly changes brightness.
Algol: the “Demon Star”
Algol in Perseus is a famous eclipsing variable. Its brightness drops when one star in the system passes in front of another, creating a predictable dimming that observers can follow over several hours.
NASA’s October 2026 skywatching notes use Algol as an easy seasonal example of a star that visibly changes brightness.
The Witch Head Nebula
IC 2118 is a faint reflection nebula near Orion. NASA’s WISE infrared view shows billowy dust clouds where stars are forming. The object is difficult visually but is a rewarding target for astrophotography.

The Jack-o’-Lantern Nebula
NASA also highlights a Spitzer infrared cloud nicknamed the Jack-o’-Lantern Nebula. Stellar radiation and winds have carved the surrounding gas and dust into a shape that fits the October theme.

The Veil adds another dramatic autumn target
The Veil Nebula in Cygnus is a large supernova remnant with thin, tangled filaments. It is a different kind of object from the Witch Head, but its ghostly structure makes it another popular seasonal deep-sky target.

Simple observing tips
Start with Algol because it is bright and easy to locate. For faint nebulae, seek a dark site, allow your eyes to adapt, and use low magnification where appropriate. Imaging can reveal structures that are far too faint for the unaided eye.
See our small-telescope stargazing guide for more practical help.