Ten Amazing Facts About Earth
Earth is a tiny point in the Milky Way galaxy, orbiting in an eternal dance with our sun about 4.5 billion years ago. It’s a speck so small that it’s hard to see with the naked eye. Yet, at the same time, Earth is so massive that it’s hard to comprehend—it takes up nearly a quarter of our solar system. But, with its complex chemistry and diverse ecology, Earth isn’t just a beautiful planet; it’s a fascinating place, full of intriguing and awe-inspiring facts.
The Earth’s Core Is Incredibly Hot
The earth’s core is a fairly hot place. (It’s probably hotter than it was four billion years ago.) The earth’s core is a solid ball of molten iron contained by solid rock. Around the core is a liquid metal called an iron-nickel alloy, which is about as hot as the sun’s surface but not as hot as the core.
Gravity Is Uneven Here
The earth’s gravity fluctuations have been monitored throughout history by locations all around the world. The data reveals an elongated periodicity of approximately 16,000 years, known as the obliquity cycle (also called the precession of the equinoxes). The gravitational force measured at the Earth’s surface is gradually changing from decreasing to increasing at the rate of 1 milligram per year (the weight of an apple seed).
Lakes Can Explode
The US National Weather Service (NWS) has been warning people in the Southeast about the possibility of a “lake explosion” since 2007. Though the NWS has not issued a warning about this event in a number of years, it has been reported that one lake in Georgia has already exploded.
Some Think The World Was Purple
The classic “purple earth” theory states that our planet used to be a deep, deep shade of purple, with the continents being made of a much more vibrant substance. Therefore, it’s no wonder that the eons-old theory was so easy to believe in. There are many pictures that back up the theory, including copious amounts of purple rocks.
Viruses Outnumber Stars
Viruses are known to infect nearly every living thing, from bacteria to plants to animals to humans—and some estimates suggest as many as one sextillion (10^17) viruses exist in the world.
Antarctica Makes Up 90% Of The World’s Ice
When you think of Antarctica, you probably think of ice, snow, and the frigid climate. But there’s more to Antarctica than just ice. The continent is a huge melting pot of biological diversity, with a wide range of ecosystems that support creatures as diverse as penguins and mice.
8 Minutes 19 Seconds From Sun To Earth
Light from the sun travels to the Earth in about 8 minutes and 19 seconds. The speed of light is one of the principal numbers in physics and astronomy, and it is important to understand what it means in everyday life.
The earth is radioactive. So are the planets and the sun. All stars are, too. The sun gives off all the energy that keeps us alive. It does this with nuclear fusion, the same process that powers stars. But don’t go thinking the sun is made of the same stuff as a star. The sun is an immensely hot ball of gas.
Potentially Another Moon
The Earth has been known to have two moons, and not just one. A new paper published in the journal “Nature” suggests that there may have been two moons in the past and that the moon that currently orbits the Earth is not the first moon that the Earth has had.
Densest In The System
Earth is the densest planet in our solar system. With 5.5 grams every cubic centimeter density on the average, Earth is nearly 20 times denser than water (0.98 g/cm3) and weighs more than twice as much as water (5.87 g/cm3). This means, despite its small size, its mass is about six times that of water.