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A random dose of beautiful scrap© What happened in my birth year? Creative photos by Chema Madoz. 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. A chromosome is made up of genetic material (one long piece of DNA) wrapped around structural support proteins (histones). Emergency and Disaster Information Service.

Moon Zoo - How To Take Part. How To Take Part We need your help to explore the lunar surface, by answering a series of questions about what you see.

Moon Zoo - How To Take Part

The most important thing to remember is that we've chosen tasks that are best done by humans rather than computer, so please don't spend much more than a minute on a any single image. Crater Survey Tutorial First off, please watch this short video demonstrating the Crater Survey interface. In this task, you'll be shown a randomly selected image of the lunar surface. To mark them, click on the 'Crater' button, and click at the centre of each crater that you can see. How the craters appear will depend on whether it was morning, midday or evening — the shadows will change dramatically over the course of a day. Once you've marked all the craters, you can click on the ellipse to stretch and move them so they mark the right size of crater. If none of the craters have boulders, then move on. Finally, don't forget to take time and look around the landscape! Boulder Wars Tutorial. Stadtkarten für Geotagger - TheJunction.

Georeferenzierung ist ja gerade der neuste Schrei.

Stadtkarten für Geotagger - TheJunction

Nachdem man sich lange Zeit mit der Begutachtung der Nachbarhäuschen von oben per Google Maps oder später dem Ablatschen des ehemaligen Schulwegs per Street View zufrieden gab, gilt es heute per Geotagging alle Fotos genauen Standorten zuzuordnen. Dieses Phänomen macht sich Eric Fischer zu Nutze, indem er bei flickr und picasa sämtliche Fotoalben durchforstet und deren Geodaten auf Open Street Map visualisiert. Dabei werden Bilder von Touristen mit roten Punkten versehen, die von Einwohnern mit blauen, die nicht zugeordnet werden konnten mit gelben Punkten.

The Particle Adventure. Time Zone Map. Google Moon: Explore The Moon Virtually From Your Web Browser. If you are interested in the Moon or the Apollo landings, you can find and read a lot of Moon-related material online.

Google Moon: Explore The Moon Virtually From Your Web Browser

But Google currently has a wonderful educational tool regarding the Moon that will interest everyone, not only Moon enthusiasts. This tool is called Google Moon. Google Moon is a free web tool that lets you explore the moon’s surface just like Google Maps lets you view the Earth’s surface. You can see the Moon in three views: Apollo, Visible, and Elevation. The view in the image above is Elevation. The Visible view will simply remove the Apollo spots and let you freely explore the Moon’s surface. Definitely an educational web service, Google Moon is one of Google’s many interesting projects. Features: Sternenkarten. Explain symbols in the map. View sky map for this observing site. Ephemeris: Azimuth in the above table follows the astronomical convention: zero degrees is South with positive angles toward the West and negative angles toward the East.

Back to Horizon Views Up to Your Sky Credits Customise Help Images produced by Your Sky are in the public domain and may be used in any manner without permission, restriction, attribution, or compensation. SETI@home. Interactive Sky Map.