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.
<meta property=“og:description” content=
”This is a website I created after being affected by the 3.11 Earthquake in Japan,
and the nuclear power plant incidents that followed.”
Howto. Manual de Spirograph.
Uno de los juguetes para dibujar más divertidos, que se lo digan a los que diseñan billetes.
Helicopter rotor wake simulation from
Mushroom vortices in round jet
From the Gallery of Fluid Motion (probably somewhere deep in the archives?)
Image 1: “Cristatella mucedo statoblast with both asymmetric oblique lighting and incident lighting” Photo by Michiel van der Waaij (source)
Image 2: same as above, but a group of statoblasts
Bryozoan Statoblast (diminutive aquatic animal of the phylum Bryozoa) (10x)
“Survival pod” of a bryozoan colony: http://en.wikipedia.org/wiki/Bryozoa#Reproduction_and_life_cycles
“Phylactolaemates also reproduce asexually by a method that enables a colony’s lineage to survive the variable and uncertain conditions of freshwater environments. Throughout summer and autumn they produce disc-shaped statoblasts, masses of cells that function as “survival pods” rather like the gemmules of sponges. Statoblasts form on the funiculus connected to the parent’s gut, which nourishes them. As they grow, statoblasts develop protective bivalve-like shells made of chitin. When they mature, some statoblasts stick to the parent colony, some fall to the bottom (“sessoblasts”), some contain air spaces that enable them to float (“floatoblasts”), and some remain in the parent’s cystid to re-build the colony if it dies. Statoblasts can remain dormant for considerable periods, and while dormant can survive harsh conditions such as freezing and desiccation. They can be transported across long distances by animals, floating vegetation, currents and winds, and even in the guts of larger animals. When conditions improve, the valves of the shell separate and the cells inside develop into a zooid that tries to form a new colony. Plumatella emarginata produces both “sessoblasts”, which enable the lineage to control a good territory even if hard times decimate the parent colonies, and “floatoblasts”, which spread to new sites. New colonies of Plumatella repens produce mainly “sessoblasts” while mature ones switch to “floatoblasts”. A study estimated that one group of colonies in a patch measuring 1 square metre (11 sq ft) produced 800,000 statoblasts.”
Image 1: ”A dish of millipedes under UV light. Most of the ones fluorescing in blue are Semionellus placidus, while the two fluorescing red are Pseudopolydesmus serratus. Red fluorescence under UV hasn’t been reported before in arthropods, to my knowledge.”
Photos by Derek Hennen. Check out his blog post for more field notes and details on identification!
Image 2: Semionellus placidus, photo by Derek Hennen (source)
Recrystallized lysine (100x)
Marasmius elegans, photo by Heino Lepp. Australia
Madreporites on sea stars
”The madreporite is a lightcolored calcerous opening used to filter water into the water vascular system of echinoderms. It acts like a pressure-equalizing valve. […] Close up, it is visibly structured, resembling a “madrepore” (stone coral, Scleractinia) colony.” — Wikipedia
Image 1: Madreporites, from Pierce and Maugel’s 1987 Illustrated Invertebrate Anatomy (via “How Starfish Move”)
These images look like exotic phyto-plankton, but in fact they are boundary of different Julia sets. Julia sets are mathematical fractals. The same pattern repeats infinitely in smaller and smaller detail. Following the same simple rules repeatedly, these amazing patterns are formed.
Source and image credit: http://www.ijon.de/mathe/julia/some_julia_sets_1_en.html
Dude! That top one totally looks like a dendrimer! Will post more about dendrimers soon…
by Barbara Doser and Hofstetter Kurt, 2006
“A screening of ecstatic moments created with the Video Feedback technique at the event horizon of perceptible worlds of image and sound while generating a moving picture. Moments distilled from experimental videos and compiled into a new unit.
Video Feedback is mapping (imaging) any visual event (image) to itself through parallelism and circulation. A minimum change of its instrument positions (video camera | screen) generate a maximum of stimuli at the time-based event horizon of perception. A flood of rapidly changing abstract images on the move will be experienced as a world of spatial complexity and of dynamic states.”
Background info on optical feedback
Ethan Turpin, Video Feedback: Pixel Behaviors, 2010,
Sight-specific installation, Kala Studio, Berkeley, CA 2010
“Pointing a live video camera at its own projection gives what is known as a “video feedback loop”. The camera reads the screen and then projects the image, in a repeating vortex. By carefully adjusting the angles and standard controls on a mid-1990′s-era video camera, Ethan Turpin isolates the self-sustaining patterns. The real-time animation can move from patterns resembling pantheistic design to microorganisms expanded to a human scale, evoking the uncanny feeling that life has emerged from within the system. Participants can move in the space between the camera and projection screen surface, integrating into the abstracted image.”
An example of Optical feedback
Examples of dynamic optical feedback image on television monitor
More information: http://en.wikipedia.org/wiki/Optical_feedback
Monocot root cross-section
“The vast majority of these illustration plates are from a plant systematics wall chart series – the Dodel-Port Atlas – released between 1878 & 1883”
Waltzing Volvox, from the Goldstein Lab at the University of Cambridge
Volvox is a colonial green algae (more info at Wikipedia)
(And someone else has uploaded a more colorful video of dancing volvox here: http://www.youtube.com/watch?v=9pjW1cMfTz8)