/home/sheriexplores/apps/router.php line 53 SQLSTATE[HY000]: General error: 144 Table './sheriexplores_exploredb/access_log' is marked as crashed and last (automatic?) repair failed

Light Years
science education resource

Light Years

To view these resources with no ads, please Login or Subscribe to help support our content development.

School subscriptions can access more than 175 downloadable unit bundles in our store for free (a value of $1,500).

District subscriptions provide huge group discounts for their schools. Email for a quote: sheri@exploringnature.org.

Light moves at 186,000 miles per second (299,000 km per second). This is how fast light travels in a year. It equals 6 trillion miles (10 trillion km). If an object in space is a million light years away, what we are seeing was how it looked a million years ago.

 

To view these resources with no ads, please Login or Subscribe to help support our content development.

School subscriptions can access more than 175 downloadable unit bundles in our store for free (a value of $1,500).

District subscriptions provide huge group discounts for their schools. Email for a quote: sheri@exploringnature.org.

Exploringnature.org has more than 2,000 illustrated animals. Read about them, color them, label them, learn to draw them.