Cosmic ‘web’ seen for first time
The hidden tendrils of dark matter that underlie the visible Universe may have been traced out for the first time.
Cosmology theory predicts that galaxies are embedded in a cosmic web of “stuff”, most of which is dark matter.
Astronomers obtained the first direct images of a part of this network, by exploiting the fact that a luminous object called a quasar can act as a natural “cosmic flashlight”.
All Of The Asteroids That Could Potentially End The World
Here’s the path of the nearly 1,400 asteroids that would cause “major devastation” if they hit our planet.
It’s no surprise that NASA is keeping track of all potentially hazardous objects, or PHOs, that surround our planet. If it’s closer than 4.6 million miles away and larger than about 350 feet in diameter, NASA’s watching it. And if a comet or asteroid’s orbit comes close enough to ours that there’s some potential for it to collide with our planet, NASA classifies it as a PHO. If something that size smacked Earth, it’d cause a major tsunami (if it hit water) or major regional destruction (if it hit land).
There are 1,397 known potentially hazardous asteroids (PHAs) at the moment, which you can see in this list. (The other PHOs are comets.) But why look at a list when you can look at a massive gorgeous picture? The image above, taken from NASA/JPL’s Photojournal, shows all 1,397 of those PHAs as represented by their orbits. Kind of amazing that we haven’t been hit by one, isn’t it?
The GRAIL mission was launched by NASA on September 10, 2011 and consisted of two small spacecraft, GRAIL A and GRAIL B. The acronym GRAIL stands for Gravity Recovery and Interior Laboratory and aimed to measure in very high quality the gravitational field of the moon. The two spacecraft, nicknamed Ebb and Flow, orbited the Moon for almost a year, starting on 31 December 2011, and ending on December 17, 2012 when they both impacted the surface of the moon. In the images generated, see above, the red zones are areas of above average gravitational pull, while blue areas are below the average gravitational attraction. The data gathered by Ebb and Flow will be used to help create much more accurate fuel consumption models for future missions to and around the moon.
Cat’s Eye Nebula
Aliens got our message, and sent it to Spoonflower? I don’t quite know where this came from, but I like it!
I found the image via freshphotons, but I can’t find the original post. The diagrams are from the Dutil-Dumas message, which was created by Yvan Dutil and Stephane Dumas and transmitted in 1999 and 2003 as part of the Cosmic Call messages. Here is a detailed description of the Dutil-Dumas message content and diagrams: PDF
The color and arrangement of the diagrams seems to be the same as the image in this SEED magazine article, “Who Speaks for Earth?”
But the tiling! The texture! Is this a fabric? I want to make things out of it!