Category Archives: Terrestrials

includes Mercury, Venus, Earth, Mars

Atmospheres of the Terrestrial Worlds

Posted on March 15, 2020 by Reece Boggs

The difference in surface conditions of the first four terrestrial planets can be explained almost solely by their atmospheres rather than their proximity to the Sun. Mercury has very little atmosphere to where it does not really play a factor in this, but the stark differences between Venus, Earth and Mars can be explained throughContinue reading “Atmospheres of the Terrestrial Worlds” Continue reading →

Posted in Physics, Terrestrials | Tagged , , | Comments Off on Atmospheres of the Terrestrial Worlds

The Rare Earth Hypothesis

Posted on April 25, 2019 by epiphany9

I was inspired by Victoria’s post to think more about the Fermi Paradox, and specifically, explanations of the uniqueness of intelligent life on Earth. The Rare Earth Hypothesis is one such explanation; it postulates that conditions favorable to life (and particularly intelligent life) are incredibly rare in the universe. It is in opposition to hypotheses […] Continue reading →

Posted in Aliens, Exoplanets, Terrestrials | Tagged , , , , , | Comments Off on The Rare Earth Hypothesis

Adaptive Archaea

Posted on April 25, 2019 by epiphany9

Discovered in 1970, Archaea might be the least well-known of the three domains of life (the others being Bacteria and Eukaryota), but it is a fascinating and diverse group of organisms and quite possibly the first on Earth. Like bacteria, archaea are unicellular, prokaryotic organisms, meaning that they lack nuclei and other membrane-bound organelles in […] Continue reading →

Posted in Aliens, Terrestrials | Tagged , , , , | Comments Off on Adaptive Archaea

A Whole New World!

Posted on April 24, 2019 by reallyroyalqueen

Because the caves, mines, and crevasses on Earth are filled with extremophiles, NASA uses those lifeforms as a guide to its exploration of the universe. The hidden parts of the planet have to make their own way of survival. Surface life has photosynthesis, but subsurface only a tiny fraction of that energy trickles down so … Continue reading A Whole New World! → Continue reading →

Posted in Class, General, Observables, Terrestrials | Tagged , , , , | Comments Off on A Whole New World!

Mars: Investigating the Red Planet

Posted on March 12, 2019 by Sam Bianco

In his hit song “Rocket Man”, musical legend Elton John aptly remarks that “Mars ain’t the kind of place to raise your kids / In fact it’s cold as hell.” The average surface temperature of Mars is 220 Kelvin, or about -64 degrees Fahrenheit. Now, I’m not sure about hell, but that’s definitely too cold … Continue reading Mars: Investigating the Red Planet → Continue reading →

Posted in Class, Terrestrials | Tagged , , , | Comments Off on Mars: Investigating the Red Planet

A Look Inside the Terrestrial Worlds

Posted on March 12, 2019 by Sam Bianco

Though we do not currently have the means to see directly inside the Earth (or any other planet), we can use clues to make inferences about what may be lying beneath their surfaces. On Earth and the Moon, our most helpful data stems from the analysis of seismic waves, or vibrations that travel along the … Continue reading A Look Inside the Terrestrial Worlds → Continue reading →

Posted in Class, Terrestrials | Tagged , | Comments Off on A Look Inside the Terrestrial Worlds

Terraforming

Posted on March 12, 2019 by peytonbrown4560

Considering all the horrible ways that either humans or otherwise could end life on Earth, the idea of inhabiting another world seems pretty nifty. The only issue with that is we need oxygen and for our soft squishy skin to not get fried by intense sunlight. So, the prospects of getting off our planet for … Continue reading Terraforming Continue reading →

Posted in Terrestrials | Tagged , , | Comments Off on Terraforming

Cars and the Greenhouse Effect

Posted on March 12, 2019 by Campbell Flower

Earth experiences a warming through the greenhouse effect: the absorption and re-emission of light from the planet’s surface by compounds in the atmosphere such as carbon dioxide and water. Greenhouse gases are necessary for keeping life on Earth warm enough to survive, but an increase in their concentration has led to a undesirable heating of … Continue reading Cars and the Greenhouse Effect → Continue reading →

Posted in Light, Terrestrials | Tagged , , , | Comments Off on Cars and the Greenhouse Effect

Gravity Waves

Posted on March 11, 2019 by Jonathan Roberts

Venus is the unfortunate victim of a runaway greenhouse effect. Not only does this make the planet uninhabitable, it also causes a tremendous degree of difficulty in observing the planet’s surface. However, there are many interesting things to gain from Venus by just looking at the atmosphere, including a massive gravity wave. Gravity waves in … Continue reading Gravity Waves → Continue reading →

Posted in Observables, Physics, Space Travel, Terrestrials | Tagged , , , , , | Comments Off on Gravity Waves

Is There Life on Mars?

Posted on March 8, 2019 by epiphany9

Mars, our red-tinted planetary neighbor, has long attracted human curiosity. Due to its unusual color, it was named after the Roman god of war. Although it is so much smaller than our planet (only about half Earth’s diameter and one-tenth its mass), it shares certain Earth-like features, particularly volcanoes and a great canyon. These structures, […] Continue reading →

Posted in Aliens, Historical, Terrestrials | Tagged , , , | Comments Off on Is There Life on Mars?