If you have ever wished there were more hours in the day, just be patient. Every century, Earth’s rotation slows down by about 1.4 milliseconds. When the dinosaurs were around, a day lasted about 23 hours. NASA reports that Earth’s rotation was exactly 24 hours in 1820, but is now off by 2.5 milliseconds.
When you look into the night sky, you are looking back in time. The stars we see in the night sky are very far away from us, so far the star light we see has taken a long time to travel across space to reach our eyes. This means whenever we look out into the night and gaze at stars we are actually experiencing how they looked in the past.
Shooting stars really aren't stars. They are usually just tiny dust particles falling through our atmosphere and they vaporize due to the heat of friction with the atmospheric gases. Earth sometimes passes through cometary orbits. As comets travel around the Sun, they leave behind dust trails.
We can only detect about 5% of the matter in the universe. The rest is made up of invisible matter (called dark matter) and a mysterious form of energy known as dark energy.