Now we’re living on a warm, hospitable planet. As Carl Sagan has said “That’s home. That’s us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives.” We, humans, are the unquestionable rulers of our little oasis in a hostile universe. But all things must pass. The life on Earth, even the planet itself, won’t last forever. What’s more, the humans may go extinct before our planet (and probably before the life on it) dies out.
Here some possible (and horrible) ways how planet Earth could die.
Continue reading How Earth Could Die – 8 Horrible Ways
On his most recent trip the International Space Station (Expedition 48),recently-retired NASA astronaut Jeff Williams has recorded a great HD video of Earth using an Ultra High Definition video camera.
Continue reading Jeff’s Earth – Amazing HD Video from ISS
Around 4 millions year ago, the ancestors of humans and chimpanzees diverged, genetic evidence suggests. What, if Chimpanzee–human last common ancestor(1) would suddenly die before giving birth to any babies? What would the Earth be like if humans never existed?
Continue reading What would the Earth be like if humans never existed
There will be a total solar eclipse on Monday, Aug. 21, 2017, and the United States will be the best country to watch. It will be also the first total solar eclipse to go coast to coast in the U.S. in 99 years. From Oregon to South Carolina, 70-mile Moon-shadow will race across the U.S. and it will completely block out the Sun for a few minutes. It’s still more than seven months away, but hotels already are selling out as people prepare for the rare and amazing event.
Continue reading Great American Total Solar Eclipse 2017
Recently, NASA published an amazing image of Earth (and Moon) taken on November 20, 2016, by the High Resolution Imaging Science Experiment (HiRISE) camera(1) on NASA’s Mars Reconnaissance Orbiter(2). The image is so incredible that we can see even the continents and clouds of Earth.
Continue reading Earth and Moon, as seen from Mars
People believe many things which are actually not true. Here are the top ten misconceptions about Earth.
Continue reading Top 10 Common Misconceptions about Earth
Here are the top ten most beautiful (well, IMHO, of course) photos taken by the astronauts aboard the International Space Station (ISS) in 2016.
Continue reading Top 10 Most Beautiful Earth Images Taken From the International Space Station in 2016
Andromeda Galaxy is the farthest object in the sky that we can see with the naked eye. But if you don’t know where to look, you won’t notice it. But if it were much more brighter, its appearance in the sky would be sensational. The moon is a good reference about what we’d see in the image below:
Continue reading If Andromeda Galaxy were brighter, this is what we’d see
When it comes to big numbers, very big numbers, human brain is weak. In fact, our brains cannot deal with the really large numbers. That’s why when the subject is Earth, planets, Solar System, galaxies, and in general, the Universe, we cannot truly conceptualize the things. A lot of people think we’re “conquering” the space (we are far, far away from that – and maybe we never will), or the “aliens” are regularly visiting Earth, as if it is just an hour’s drive from there. In fact, these people don’t truly understand what are they talking about, how big is the universe, how far the stars are, and how the Earth is a tiny, tiny spot in a vast space we are still striving to understand.
Continue reading The Size Of Earth Compared to Other Planets and Stars (and the Universe)
In 240 BC, the Greek astronomer, geographer, mathematician, music theorist and librarian Eratosthenes of Cyrene (c. 276 BC – c. 195/194 BC) calculated the circumference of the Earth without leaving Egypt. Here’s how:
Continue reading How Eratosthenes calculated the Earth’s circumference