Winter Solstice in the Northern Hemisphere
When:Monday, December 21
Target Audience:General Audience
The December solstice, which occurs on December 21 this year, marks the winter solstice in the Northern Hemisphere and the summer solstice in the Southern Hemisphere. On the December solstice, the Sun reaches its southernmost position in the sky, no matter where on Earth you happen to be.
The Sun's changing height in the sky throughout the year is caused by Earth's tilt as it orbits our local star.
Learn more in this month's episode of NASA's "What's Up" video series:
For more details and skywatching tips, visit NASA's Solar System Exploration website.
Astronomy Activities for Students
Explore our collection of student projects, slideshows, videos and more all about astronomy.
Astronomy Lessons for Educators
Explore our collection of standards-aligned STEM lessons all about astronomy and NASA missions to explore the stars.
- For Families
Learning Space With NASA at Home
Explore space and science activities students can do with NASA at home. Watch video tutorials for making rockets, Mars rovers, Moon landers, and more. Plus, find tips for learning at home!
- Article for Kids: What is a Solstice?
- Program: Night Sky Network
- Article for Kids: What is an Exoplanet?
- Website: NASA Exoplanet Exploration
- Posters & Coloring Pages: Exoplanet Travel Bureau
- Interactive: Eyes on Exoplanets
Events are based on visibility in the Northern Hemisphere. Dates and clock times are for the Pacific time zone unless otherwise noted.