Space. M104b_peris2048.jpg (2048×1410) SolStation.com. The Carl Sagan Portal. The Planetary Society. 0.10-bortle.jpg from stellarium.org. NASA Astrobiology. NASA Spitzer Space Telescope. Interactive 3D model of Solar System Planets and Night Sky. The Scale of the Universe. Light travels at 300,000 kilometres per second (186,000 miles per second).
In one second, a beam of light can travel SEVEN TIMES around the Earth. This table shows a number of distances to various objects expressed in terms of how long a beam of light takes to travel that distance. Time scales longer than the age of the Universe are possible because of the expansion of the Universe. The scale of the Universe and our place in it are well summarised in Monty Python's Galaxy Song. © 1997, 2013 KryssTal You can try out our Testking 220-701 certification material and latest 642-427 dumps to get high flying success in testking 642-262 certification exams, beside testking 77-605 exam product for certifications like testking 70-541 are also very useful tools.
In astronomy times are confusing because of the large numbers of zeros in the figures. This link will open in a separate window The Official Superstring Web Site An excellent site containing information about superstrings and cosmology. Scale of Universe - Interactive Scale of the Universe Tool. Large-scale structure of the Universe HubbleSite - Out of the ordinary...out of this world. Cell Size and Scale.
Some cells are visible to the unaided eye The smallest objects that the unaided human eye can see are about 0.1 mm long.
That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. A magnifying glass can help you to see them more clearly, but they will still look tiny. Smaller cells are easily visible under a light microscope. It's even possible to make out structures within the cell, such as the nucleus, mitochondria and chloroplasts.
To see anything smaller than 500 nm, you will need an electron microscope. How can an X chromosome be nearly as big as the head of the sperm cell? No, this isn't a mistake. The X chromosome is shown here in a condensed state, as it would appear in a cell that's going through mitosis. A chromosome is made up of genetic material (one long piece of DNA) wrapped around structural support proteins (histones). Adenine The label on the nucleotide is not quite accurate. Carbon. Alien Earths Online - www.alienearths.org.
Astronomy Picture of the Day. Discover the cosmos!
This is the world of "string theory," a way of describing every force and all matter from an atom to earth, to the end of the galaxies—from the birth of time to its final tick, in a single theory, a "Theory of Everything. " Our guide to this brave new world is Brian Greene, the bestselling author and physicist.
BRIAN GREENE (Columbia University): And no matter how many times I come here, I never seem to get used to it. NARRATOR: Can he help us solve the greatest puzzle of modern physics—that our understanding of the universe is based on two sets of laws that don't agree? NARRATOR: Resolving that contradiction eluded even Einstein, who made it his final quest. S. BRIAN GREENE:The atmosphere was electric. S. Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes. Gateway to the Universe of X-ray Astronomy!