Seasonal Constellations
Recognise named constellations visible in different seasons and understand why we see different constellations at different times of year, because Earth's orbit around the Sun changes which part of the sky we face at night
What a learner can do afterwards
- Name at least three constellations (e.g. Orion, Ursa Major/Big Dipper, Leo, Cassiopeia)
- State that different constellations are visible in different seasons
- Explain that this happens because Earth's orbit means we face different directions in space at different times of year
1 · Read
You already know how to spot Orion and the Big Dipper, and you know Earth spins and circles the Sun. Now put those two ideas together. As Earth travels along its orbit, your night side points toward a different direction in space each season. That means the stars behind you change too, and so do the constellations you can see.
In January, Mia looks up after dinner and finds Orion, with his three-star belt. By June, Orion is gone. Instead she finds Leo low in the west. Same sky, same Earth, but six months later Earth sits on the other side of the Sun, so night now faces a different direction.
A few constellations, like the Big Dipper, stay visible most of the year because they circle close to the pole. Others, like Orion, only show up for part of the year. Check the season to know which one to look for.
Because Earth orbits the Sun, we face a different part of space each season, so different constellations rise into view: Orion in winter, Leo in spring, and others through the year.
More to read
How to Find the Big Dipper: 10 Steps
The Big Dipper is not a constellation by itself. It is part of the larger constellation Ursa Major (the Great Bear). The seven bright stars form a ladle shape. The two stars at the end of the bowl point toward Polaris, the North Star. The Big Dipper is circumpolar for most of the northern hemisphere. That means it never sets below the horizon. It circles Polaris once every 24 hours. In spring it is high overhead. In fall it scrapes the northern horizon. You can use it to find north any night of the year.
Simple Ways to Identify the Stars: 10 Steps
Stars seem fixed, but the night sky changes with the seasons. Earth orbits the Sun, so we face different directions in space at different times of year. In winter, Orion the Hunter dominates the sky with his bright belt of three stars. In spring, Leo the Lion climbs high. In summer, the Summer Triangle (Vega, Deneb, Altair) shines overhead. In fall, the Great Square of Pegasus appears. Constellations are like seasonal markers. Ancient farmers used them to know when to plant and harvest. Today they still help us navigate the night.
Key points: Seasons
Seasons happen because Earth's axis is tilted about 23.5 degrees. As Earth orbits the Sun, the tilt stays pointed the same way in space. In June, the northern hemisphere leans toward the Sun. Days are longer, sunlight is more direct. That is summer. In December, the northern hemisphere leans away. Days are shorter, sunlight hits at a slant. That is winter. The southern hemisphere has opposite seasons. The tilt also changes which constellations we see at night. In summer we face one direction in space. In winter we face the opposite direction.
Explore more
2 · Watch
به انگلیسیTake it off screen
Where it sits
Learn first
This opens up
Nothing builds on it yet.
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
8 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.