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M104b_peris2048.jpg (2048×1410) Free for personal use . . . On-line Star Maps - Right click and drag to view the local stars in 3D. Double-click to learn more about notable nearby stars and to see orbit animations of multiple star and planetary satellite systems.
The Carl Sagan Portal
The Planetary Society
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{*style:<ol>*} {*style:<li>*} {*style:<h3>*}{*style:<a href=''>*}First Earth-Size Planet in the 'Habitable Zone’ of Another Star{*style:</a>*}{*style:</h3>*} {*style:<br>*} {*style:<br>*}{*img:452:255:*} The artist's concept depicts Kepler-186f , the first validated Earth-size planet to orbit a distant star in the habitable zone. Image Credit: NASA Ames/SETI Institute/JPL-Caltech{*style:<br>*}Using NASA’s Kepler Space Telescope, astronomers have discovered the first Earth-size planet orbiting a star in the “habitable zone” — the range of distance from a star where liquid water might pool on the surface of an orbiting planet. The discovery of Kepler-186f confirms that planets the size of Earth exist in the habitable zone of stars other than our sun. NASA Astrobiology NASA Astrobiology
NASA Spitzer Space Telescope
Interactive 3D model of Solar System Planets and Night Sky Interactive 3D model of Solar System Planets and Night Sky Description 3D simulation of the Solar System and night sky in real time - the Sun, planets, dwarf planets, comets, stars and constellations. - Heliocentric view with real-time positions of planets and planetary orbits - Schematic and realistic sizes of the planets and distances between them - Movement of the planets in time to see how they move in relation to each other - Virtual Orrery - Planetary exploration with info texts and additional views such as structure - Dwarf planets (Pluto, Ceres, Haumea, Makemake. Eris) and their orbits - Comets (Siding Spring, Lovejoy 2013, Lovejoy 2011, Panstarrs, ISON, Halley) - positions and trajectories - Stars and constellation of the night sky as viewed from a given location - Changes in the night sky during night, month and year - Searching of the stars and constellation, ecliptic line, grid lines and more
The Scale of the Universe 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.
Scale of Universe - Interactive Scale of the Universe Tool
Large-scale structure of the Universe‬‏
HubbleSite - Out of the ordinary...out of this world.
Alien Earths Online -
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2014 April 14 An Unusual Globule in IC 1396 Credit & Copyright: T. Rector (U. Alaska Anchorage) & H. Astronomy Picture of the Day Astronomy Picture of the Day
NOVA | The Elegant Universe | 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. 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. NOVA | The Elegant Universe | Watch the Program (full-screen)
Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes PICTURE OF THE DAYsee all » This image shows part of the North America Nebula (NGC 7000) in the constellation Cygnus the Swan. The orange supergiant Xi Cygni (also known as 62 Cygni) is the central star, together with the “west coast” of NGC 7000. (2.4-inch Takahashi FS-60C refractor at f/6.2, Quantum Scientific Instruments QSI 540wsg CCD camera, Hydrogen-alpha/RGB image with exposures of 60, 10, 10, and 10 minutes, respectively) Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes
The word light usually makes one think of the colors of the rainbow or light from the Sun or a lamp. This light, however, is only one type of electromagnetic radiation. Electromagnetic radiation comes in a range of energies, known as the electromagnetic spectrum. The spectrum consists of radiation such as gamma rays, x-rays, ultraviolet, visible, infrared and radio. Electromagnetic radiation travels in waves, just like waves in an ocean. The Chandra X-ray Observatory Center :: Gateway to the Universe of X-ray Astronomy! The Chandra X-ray Observatory Center :: Gateway to the Universe of X-ray Astronomy!
The Universe in Colour