A pretty cool result came out of Cornell University this week, showing that Mars was struck by a pair of ancient asteroids that caused massive tsunamis. Not only is it the first evidence of a tsunami event on another world, but it proves that Mars once had a large ocean. The study looked at ancient shorelines between the lowlands and highlands of Mars, where the ocean-land boundary would have been. Two massive impacts, a few million years apart, extended the shorelines and caused turmoil with the Martian climate at the time. “About 3.4 billion years ago, a big meteorite impact triggered...
In 2014, comet C/2013 A1, known as sliding spring, came within 140,000 Km of the planet Mars. This is a bit more than a third of the distance from the Earth to the Moon. Comets are small, so gravitationally this interaction was insignificant, but from an electromagnetic point of view, things were shaken up big time! Comets are small, relatively speaking. A typical comet is a few kilometers across, about the size of a big city. But with sunlight melting ices and liberating gases and dust from the comet’s interior, the part of the comet we see in the sky,...
Can we grow crops on the Moon? How about Mars? If you saw the movie “The Martian,” it seems you could grow potatoes on Mars with a supply of water, oxygen, and some fertilizer, but without these necessities (soil nutrients, water, oxygen) they just wouldn’t last. If we eventually want to colonize places like the Moon and Mars, finding a way to live off the land is a must. The sunshine will help, but can we really grow crops on alien soil? As it turns out, Earth scientists have been working on this problem, by simulating the soils of the...
You know the thing I mean, when it suddenly goes dark in the middle of the day and looks all fiery. Stars come out in the daytime and animals go crazy. When silly people pray extra hard for some reason. I swear the Moon is involved. It looks like this…. Ah yes the solar eclipse, the rare event that only occurs because the Sun is both 400 times wider and 400 times more distant than the Moon. It’s a mathematically beautiful event that only occurs every 5 years on average. And when it does happen, the total coverage of the...
It takes a long time for things to change in the Universe. Time takes on an entirely different role when it comes to the lives of planets, stars, and galaxies. A million years in the life of a star or planet is the equivalent of a single day in the life of a human being. Human lifetimes come and go while stars and planets stay pretty much the same. However, just like human lives, where many days can build up to an important event, millions of years of lead-up can produce some incredible changes to a planet or star. New...
Inhabited entirely by robots, Mars is the enigmatic planet that is under intense exploration by humanity. The curiosity rover has been making it’s way closer to Mount Sharp in the Gale Crater, intending to slowly climb the mountain, sampling rocks from different eras in Mars’ history along the way. One of the last regions to cross before beginning its ascent is the region known as the Bagnold dunes, strange dark features similar to sand dunes on Earth. Photos from Curiosity show the beauty and detail in the dark features. The dark dunes have very interesting ripple features, similar to those...
We know that Mars lost an ocean of water, but what was the exact mechanism? We also know that the magnetic field of Mars was lost a long time ago, and contributed to this major loss of water and atmosphere. In a press conference today, NASA officials working with data from the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft, have shown that major solar storms have increased the amount of atmosphere and water loss over time. “Mars appears to have had a thick atmosphere warm enough to support liquid water which is a key ingredient and medium for life as...
I went to the movies last night to see ‘The Martian,’ something I have been excited about for a long time. The theatre was packed, and the movie was amazing, both unsurprising facts. I had very few scientific issues with the film, even with low standards for a big screen pic, but mostly due to first thing the screen showed: ‘NASA was heavily consulted to ensure the science in this movie is accurate.’ Way to go Hollywood! My favourite parts of the movie employed some hilarious use of technical definitions. For example, when Mark Watney grows potatoes on Mars, he says...
After an epic weekend of eclipse talk, NASA came out with a press conference that overshadowed much more than just the Moon. The announcement, as many had speculated, revealed that conclusive evidence shows there is flowing water on Mars. Like seasons on Earth, warmer conditions cause water to flow down steep hills and into valleys. The speculation came due to the invitation of Lujendra Ojha of the Georgia Institute of Technology to the NASA panel. Ojha noticed strange features on Mars as an undergraduate student in 2010, while looking at images from the Mars Reconnaissance Orbiter (MRO)’s High Resolution Imaging Science...
