How does Earth compare with other planets in terms of size? Within our own solar system, Earth is the largest of the rocky, so-called terrestrial planets. The smallest, Mercury, is only 40% the radius of Earth. However, Jupiter is 11 times bigger than Earth and is the largest planet in...
Many scientists believe that intelligent life forms may exist on other planets and messages should be sent into space to contact these life forms. Other scientists think this is a bad idea because these life forms could be dangerous. Discuss both these views and give your own opinion. Give rea...
With a clearer picture of Pluto streaming home from New Horizons at this very moment, it seems a good time to take stock about what we now know. For starters, Pluto definitely is smaller than Mercury (sorry 1986 me), but more importantly, how does it compare to Earth? If we're really...
Earth is one of eight planets that belong to the Solar System and orbit around a large star that is often called the Sun. Not only is the Earth orbiting around the Sun, but it also revolves about its own axis, or in other words, spins.Answer and Explanation: Earth revolves on its axi...
Aliens are creatures that humans imagine live on other planets. I know, it’s strange. But it does feel like my body, my whole life really, has been taken over and is now controlled by a very busy and strange colony. I feel nothing like myself and struggle daily to cope with all ...
1. What evidence did ancient Greek astronomers have that Earth does NOT move? 2. How do we know it DOES? What do we mean by apparent retrograde motion of planets? Why was it difficult for ancient astronomers to explain? How do we explain it today?
As such, we must become better operators of Spaceship Earth. We need to think in the loops and cycles of nature so that with just the power of the sun we’re able to always “restock” without running up against finite material limits. How does this perspective inform circular thinking as...
As we shall see, this relatively small temperature difference had huge consequences for the global average surface temperature of the Earth and for the Earth’s climate state. In oceans and seas certain water goes down and other water wells up from the deep oceans, both in huge quantities. ...
As you might imagine, there was no real plan to do anything of the sort. The so-called “operative” was an undercover FBI informant. None of the recruits had any contact with anyone in al-Qaeda or any other terrorist group. They never had the means to carry out any attack. They did...
One of the questions I get asked a lot, is how on earth do I manage to travel so much with hardly any money? As a result, I thought that it might be useful to write all of my tips down as concisely as possible, even though it’s already been done many times before…...