So, as we learned previously, sound can actually travel through space. But the recordings our spacecraft send us from other planets or from the edge of the Solar System aren’t really that kind of sound. Acoustic waves require a medium; they travel when particles bump into one another, which, given the sparseness of space, means that only very low frequency sounds can travel. But space has a lot of ions and plasmas – charged particles like electrons and protons – and those particles can interact without physically contacting one another. Instead their motion causes a changing magnetic field that affects nearby particles, which in turn affect more particles (and so on). This transmits what’s called ionic sound. Check out the video above to hear some awesome examples of the ionic sounds of our solar system! (Video credit: The Point Studios)
The evidence is mounting that our solar system is rife with oceans. Last week, scientists reported that Pluto could have an insanely deep liquid water swimming pool beneath its surface, and on Monday, NASA revealed new evidence for geyser activity on icy Europa. Now, another frozen moon is poised to join the club of outer space scuba retreats: Dione.
The fourth largest moon of Saturn, Dione was first imaged by the Voyager space probes in the 1980s, and has been viewed more recently by the Cassini spacecraft, during a series of five close flybys. It’s a beautiful, cratered ball of ice and rock, home to deep canyons and towering cliffs. While early flybys offered hints of geologic activity, there’s never been a smoking gun to prove Dione is alive inside—particularly when compared with its next-door neighbor (and orbital resonance partner) Enceladus, which is spewing seawater out of enormous geysers.
Dione against the rings of Saturn
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I haven’t got much studying done this week, but I had a good reason, I promise! I ran to the bookstore to grab a copy of Crooked Kingdom, and ended up meeting Jandy Nelson (the author of my favorite book, I’ll Give You The Sun), as well as the authors Sabaa Tahir and David Arnold. It was an amazing experience, and I’ve been in a book haze ever since!! But it hasn’t left me much time to do my physics homework haha.
Simone Biles is officially a superstar and a scientific marvel.When Biles pulls off her signature move, her distance from the floor is basically equal to her height. She gets that high up on the strength of her muscles, propelling herself with enough speed and kinetic energy to actually reach that height. And the way she lands literally seems to defy physics.
No batteries required: The first autonomous, entirely soft robot
The octobot is powered by a chemical reaction and controlled with a soft logic board. A reaction inside the bot transforms a small amount of liquid fuel (hydrogen peroxide) into a large amount of gas, which flows into the octobot’s arms and inflates them like a balloon. A microfluidic logic circuit, a soft analog of a simple electronic oscillator, controls when hydrogen peroxide decomposes to gas in the octobot. Credit: Lori Sanders
Recent technological and scientific advances have fuelled a neuroscientific revolution. Imaging techniques such as those shown above have given us an unprecedented view into the structure and function of our brain.
Recently, NASA have discovered something that could be an alien megastructure in space effecting the star KIC 8462852. This theory comes from observations made showing that the star was dimming by more than 20%, then it would brighten again and then dim weeks, sometimes months later. Originally the most credible theory was that a huge, and I mean HUGE swarm of comets was passing in front of the star blocking a substantial portion of light that was being emitted from it. However, this does not fully explain it. There are no other observed stars that seem to show this kind of behaviour so scientists are still struggling to work out what is causing it. Astronomer Jason Wright was the one to speculate that it could be an alien megastructure in the process of being built around the star. It is theoretically possible to build such a device around a star that would be used harvest the energy. This alien civilisation would be far more advanced than us and the device they could be building could be similar to a Dyson Sphere. But what could they possibly need such a large energy supply for?
if usain bolt played a concert Bb on a trumpet while running past you at his 100m wr pace, you would hear the note almost exactly a quarter step sharp when approaching you and almost exactly a quarter step flat as he runs away
this is what I do with my master’s degree
2.08 / camping last week was great but means I haven’t been active in a while u.u here is a pic of my freshly reorganised desk ready for hours of crazy revision next year I’m sure! Started off my summer work by catching up on some physics notes x