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Scale: Distance
Scale: Distance
Atom
25nm to 300nm Virus
130nm smallest features on a semiconductor chip (2003)
100,000nm Human hair
MolecularDevices/HowBig
| Name: | MolecularDevices/HowBig | |
| URL: | http://moleculardevices.org/howbig.htm | |
| Categories: | A Sense of Scale | Scale: Distance | |
| Referred: | 232 | |
Timing electrons
How long does it take an electron to jump from one atom to another? According to a team of physicists in Germany and Spain, the answer is just 320 attoseconds. They came to this conclusion using X-ray pulses to watch an electron as it travelled from a sulphur atom to the surface of ruthenium metal. The process was one of the fastest ever studied (Nature 436 373).
Martian view of Earth
The first ever picture of the Earth taken from the Red Planet has been obtained by the Mars Global Surveyor (MGS) spacecraft. This is our world as the Martians would see it.
Distant Earth is blue and beautiful against the deep darkness of space. The Moon is close by.
It is another reminder of our smallness against the vastness of the cosmos. A mote of dust suspended in a sunbeam, as Carl Sagan once put it.
Powers of Ten website
View the Milky Way at 10 million light years from the Earth. Then move through space towards the Earth in successive orders of magnitude until you reach a tall oak tree just outside the buildings of the National High Magnetic Field Laboratory in Tallahassee, Florida. After that, begin to move from the actual size of a leaf into a microscopic world that reveals leaf cell walls, the cell nucleus, chromatin, DNA and finally, into the subatomic universe of electrons and protons.
A Sense of Scale | Scale: Distance
CERN: Powers of Ten
| Name: | CERN: Powers of Ten | |
| URL: | http://microcosm.web.cern.ch/Microcosm/P10/english/P0.html | |
| Categories: | Scale: Distance | A Sense of Scale | |
| Referred: | 300 | |
Distance to the Oort Cloud
The Oort Cloud is about 250 Astronomical Units out from the Sun.
One Astronomical Unit
One astronomical unit (AU) is the distance from the sun to the earth, about 93 million miles.
Sense of Scale: Distance
| Name: | Sense of Scale: Distance | |
| URL: | http://www.falstad.com/scale/ | |
| Categories: | Scale: Distance | |
| Referred: | 225 | |
2002-08-25 visit Sense of Scale: Distance | read more
Farthest human artificact
The NASA Astrobiology Magazine reports today the 25th anniversary of the Voyager I launch, now the farthest human-made object at 93 Sun-Earth distances (93 AU), or 12 light-hours away. Expected battery life to 2020.
