Category Archives: Earth
There was a bit of a press frenzy last week surrounding the idea of a global flag that could be used in instances of human exploration off our planet, where international collaboration could be celebrated and memorialized on alien worlds rather than the more old-timey nationalistic space races with various countries’ flags dotting remote landscapes across the Solar System. To this end Oskar Pernefeldt, a design student at Beckmans College of Design in Stockholm, Sweden, created a proposal for a “Flag for Planet Earth” as a senior project – a flag that could be proudly planted and worn by future astronauts as we expand our presence through space. Various news sites picked up the story, as seen in this article on Verge.com by Jacob Kastrenakes – and it spread from there as “this is the flag we’ll plant” when we land on Mars, an asteroid, the Moon (again), Europa, etc., etc.
The question is: will it really? And more importantly, would we even want it to be? I, for one, would not.
Everyone knows that Earth is a “water-world,” with oceans covering 71% of its surface and at least as much contained within our planet’s mantle deep below its crust. But there’s also liquid water to be found elsewhere in the Solar System: on Mars, on the dwarf planets Ceres and Pluto, and also on the icy moons of Jupiter, Saturn, and Neptune.
NASA is on the hunt for this water, for the main reason that it’s the key ingredient for the evolution of Earth-type life. Where liquid water exists, if there are organic molecules and energy sources as well then the stage is set for life having evolved independently of Earth. And if we can find that that’s the case somewhere, anywhere else in the Solar System, then that would be a huge – no, make that giant – step toward answering the Big Question: are we alone in the Universe?
Today NASA scientists held a conference about the search for oceans beyond Earth, and how we are currently and plan to find out where and how much is (or even was) out there. An infographic accompanied the press materials released.
“What we’re finding out is that the Solar System really is a soggy place.”
– Dr. Jim Green, NASA’s Planetary Science Director
Check out the full infographic below, along with a video of the conference.
ESA’s comet-chasing Rosetta mission is best known today for its two historic firsts of entering orbit around a comet and sending a lander onto the surface of said comet, in May and November of 2014 respectively. But Rosetta didn’t just go directly from its March 2, 2004 launch to comet 67P; it had to perform several flyby maneuvers beforehand with planets and asteroids on its way out to meet a comet. And now, ESA has shared many of the images acquired during those close passes during its cruise phase in a series of online albums for the public to easily access.
The image above shows the Moon beyond the hazy line of Earth’s atmosphere, acquired on March 4, 2005 during Rosetta’s first gravity-assist flyby of Earth just over a year after its launch. (Rosetta made three such passes by our planet before gathering enough velocity to make it out to 67P!)
See a list of Rosetta’s flybys below and find out how to access the albums.
Former NASA astronaut Ron Garan was recently interviewed for Huffington Post’s LIVE broadcast. Ron talked about his new book The Orbital Perspective (read my review here) along with what it was like to be an astronaut and the way his experiences changed his views of life on Earth. (He also live-narrated some of the work being done at the time of the interview outside the ISS during EVA 30!)
In addition to talking about astronaut stuff, Ron weighed in on the human exploration of Mars, recently brought into the spotlight – for better or worse – with the announcement of 100 finalists by the Dutch MarsOne company, which has aspirations of creating the first human colony on the Red Planet. Ron says that while it will be important for us to venture out into the Solar System, really the next logical step would be to establish a permanent presence on our own Moon first.
“This is our closest neighbor, it’s three days away… There are so many things that could be done on the Moon that would have tremendous benefit.”
– Ron Garan, NASA astronaut
You can watch the entire video here, and share what you think in the poll below – should we go back to the Moon first? Or head right on out to Mars?
Recently featured on Universe Today, this video of Earth from space assembled by video artist Phil Selmes uses actual photos captured from the Space Station, with some fancy editing to create seamless transitions between views. It’s another beautiful presentation of the fragile oasis we call home.
“I don’t see politics, races, borders, countries, religions or differences,” Selmes said in an article on Universe Today. “I saw one planet, one world, one incredibly beautiful miracle in the absolute vastness of the universe.”
I just had to share this beautiful image by ESO photo ambassador Babak Tafreshi; it shows a star-filled night sky above the Chajnantor Plateau on the border of Chile and Bolivia, the site of the Atacama Large Millimeter/submillimeter Array (ALMA) observatory. The site, chosen for its remote location and incredibly clear, dry sky, is one of the best on Earth for observing the most distant objects in the Universe.
The jagged snow features in the foreground are known as penitentes, for their resemblance to the conical hats of Spanish religious group members known as the Nazarenos. They are the result of Sun and wind erosion on high-altitude snow, although the exact process isn’t entirely known.