Before demonstrating magnetic levitation this video shows a small magnet being cooled to a superconducting temperature using liquid nitrogen. Once cooled the superconducting magnet is shown performing magnetic levitation above a section of magnetic track as seen in the featured image.
Although thousands of asteroids have been discovered and their orbits determined there are thought to be many undetected ones. This asteroid will cross Earth’s orbit of the Sun every three years and is called Asteroid 2014 UR116. It was recently discovered by a Russian professor at Moscow State University, Vladimir Lipunov. It is the size of a mountain (400m across) – much larger than the 164 feet (50m) across mentioned in my post about Asteroid Day.
Having read about Asteroid 2014 UR116 in The Telegraph I can’t determine how much of a threat it is. On the one hand NASA says this Near Earth Object (NEO) doesn’t pass near enough to earth to be a threat, but on the other NASA says it will be an impact threat for the next 150 years.
There is a movement by astronomers, scientists, astronauts, artists, business leaders, and others, concerned for the long term safety of our species, other species, and our planet, to establish Asteroid Day on the 30th June each year commencing in 2015.
I have been brought up to understand that I live in an expanding universe, but now that theory has been popped. According to an article in Sci-News.com the universe is not expanding. Measurements have been made of the brightness of stars throughout the universe and they are not consistent with that which theory would predict if the universe were expanding in the way presumed for many years. If there is no significant expansion then the red shift seen in the light from distant objects must have another cause. Continue reading “Universe is Not Expanding – Pop Goes That Theory”
A meteor narrowly missed a skydiver, Anders Helstrup in 2012, when it passed him, on its way to earth, after he opened his parachute whilst skydiving above Hedmark, Norway. It was all captured on his helmet cam.
The “dark flight” meteor (called that because it was not glowing hot) is thought to have broken off a larger meteor higher in the atmosphere. It was considered to be the first time such a meteor has been captured on video.
Astronomers have found another dwarf planet in the Solar System. This is a dwarf planet and it doesn’t have a real name yet. It just has a number ‘2012 VP113’ as do so many dwarf planets in the region of space occupied by Pluto. It doesn’t seem long ago that there was just Pluto beyond Neptune but new dwarf planets are being discovered regularly. There is a long list of them (46) here by Mike Brown (not updated since 2008), but here is Mike Brown’s up to date list of Probable Plutoids (as of 27/03/2014) and other people’s submissions at Wikipedia.
This poster/wall chart was produced by SPACE.COM as a quick guide to Kuiper and Oort Objects.
Knowledge of the Kuiper Belt and the Oort Cloud is sparse but it is known that some objects have very eccentric orbits. I think we can expect many more objects to be discovered in this area in coming years.