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Space. M104b_peris2048.jpg (2048×1410) The Carl Sagan Portal. The Planetary Society. 0.10-bortle.jpg from 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).

The Scale of the Universe

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. 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.

Cell Size and Scale

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. Adenine The label on the nucleotide is not quite accurate. 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. Alien Earths Online - Astronomy Picture of the Day. Discover the cosmos!

Astronomy Picture of the Day

Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2016 April 15 Mercury and Crescent Moon Set Image Credit & Copyright: Miguel Claro (TWAN, Dark Sky Alqueva) Explanation: Innermost planet Mercury and a thin crescent Moon are never found far from the Sun in planet Earth's skies. Taken near dusk on April 8, this colorful evening skyscape shows them both setting toward the western horizon just after the Sun.

Tomorrow's picture: Heliopause Electrostatic Rapid Transit System Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)NASA Official: Phillip Newman Specific rights apply.NASA Web Privacy Policy and Important NoticesA service of:ASD at NASA / GSFC& Michigan Tech. Watch the Program (full-screen) The Elegant Universe: Part 3 PBS Airdate: November 4, 2003 NARRATOR: Now, on NOVA, take a thrill ride into a world stranger than science fiction, where you play the game by breaking some rules, where a new view of the universe pushes you beyond the limits of your wildest imagination.

Watch the Program (full-screen)

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?

Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes. Gateway to the Universe of X-ray Astronomy! The Universe in Colour.