Number 2- The universe is incredibly vast. Light from the closest known galaxy, Andromeda, takes about 2.5 million years to reach Earth. This means that when we look at Andromeda, we are seeing it as it appeared millions of years ago.
Number 3. Astronauts on the International Space Station (ISS) experience a phenomenon called "time dilation" due to the spacecraft's high speeds and proximity to Earth's gravitational field. Over a year in space, an astronaut would age slightly slower compared to someone on Earth.
Number 4. Space is not completely silent. It may be a vacuum, but sound waves cannot travel through it. However, there are other forms of electromagnetic waves, such as radio waves and X-rays, that can be detected and studied.
Number 5. The highest point on Earth is Mount Everest located in the Himalayas with a peak at approximately 29,032 feet Equal to 8,848.9536 meters above sea level. Conversely, the lowest point is the Mariana Trench in the western Pacific Ocean, reaching a depth of about 36,070 feet (10,994 meters) below sea level.
Number 6. The number of stars in our Milky Way galaxy is less than the number of trees on Earth. The estimated number of trees on our planet is around 3 trillion, while there are approximately 100 billion stars in our galaxy.
Number 7. Birds are living dinosaurs. Birds are considered the direct descendants of a group of theropod dinosaurs known as maniraptorans. This means that when we see birds today, we are actually observing living dinosaurs.
Number 9. The world's most active volcanoes are located in Indonesia.
Number 10. Around 97% of the Earth’s water can be found in the five oceans.
Number 12. Only 5% of the ocean has been explored.
Number 13. Up to ten million viruses can be found in only one millilitre of surface water collected from the coast.
Number 15. Being the densest object in the universe, just one teaspoon of a neutron star would weigh 6 billion tonnes.
Number 16. The first planet to be discovered using mathematical calculations instead of telescopic location was Neptune.