What color are the different planets? How did you get through the asteroid belt? How big is your ship? Who will you take with you on the journey? Share your story with a friend or family member. Write a story describing your journey from the Earth to the sun and all the way out to Pluto. To help you, have a look at this interactive map of our solar system.
Imagine you're a space explorer and you have a spaceship that can take you to the edge of our solar system. How would you like to have the job of watching out for near-Earth asteroids? How close is close when they say near Earth? Share what you’ve learned with a friend or family member. Check out this article about NASA's Center for Near-Earth Object Studies, which tracks comets and asteroids that come near Earth. Do you find the phenomena of asteroids interesting? You may also think it’s scary or exciting, but scientists are looking out for asteroids all the time. Ready to learn more? Try out the following activities with a friend or family member. How would you have explained it? Would you have thought it was a UFO? A comet? Event scientists are still trying to solve the case today! Imagine you witnessed the Tunguska Event. Had it reached the ground, it would have made a crater around two miles wide. The asteroid would have looked like a fireball in the sky as it streaked above the Siberian forest. If these experts are right, the Earth had a very close encounter. To do so, the rock must have been around 650 feet wide. Scientists at the Siberian Federal University now believe an asteroid passed through the atmosphere instead of exploding. This was the leading explanation for nearly a hundred years. To explain this, the team concluded that the rock must have exploded in the Earth’s atmosphere. Kulik’s team believed that a rock from space-like an asteroid or a comet-caused the Tunguska Event. Nearly two decades later, trees in Hiroshima, Japan, were left in the same condition after the city was hit by an atomic bomb. However, they were stripped of all limbs and bark. When they arrived, they found that trees at the center of the event were standing upright. Petersburg Museum’s meteorite collection as a curator. In 1927, Leonid Kulik led a team to the site. Due to the harsh Siberian conditions, it was years before a team of scientists could investigate the area. Locals even wondered if it was the work of an angry god. They thought the heat and flames could have been caused by a spaceship from another planet. Just after the event, some people pointed to aliens. What caused it? Experts have worked to answer that question for decades. It’s also known as the Tunguska Explosion or Tunguska Impact. Today, this incident is known as the Tunguska Event. The event killed many animals, including reindeer, and up to three people are believed to have died. As far away as eastern Asia, the night sky glowed with sunlight reflected from dense cloud cover. Forests were flattened over 80 million trees were knocked to the ground. One person described seeing “the sky split in two.” People saw flames streak through the air above the forest’s trees.Įven 40 miles away, people were knocked to the ground by wind and heat. 
People felt a sudden, intense heat and heard loud bangs coming from near the Tunguska River. On June 30, 1908, strange reports poured in from Siberia. Today’s Wonder of the Day is about another mystery-the Tunguska Event. If you’ve been WONDERing with us for a while, you may already know about UFOs.
Sometimes, though, science has difficulty explaining things people see in the sky. Stare up at the sky long enough, and you’ll certainly see some pretty cool stuff! Have you ever watched a meteor shower? How about a solar eclipse? Maybe you’ve seen a comet soar overhead.
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