background preloader

To Scale: The Solar System

To Scale: The Solar System

Related:  h07katkarSystème solaireAstronomieDivers 2

Solar System, Solar System Information, Facts, News, Photos Our Cosmic Neighborhood From our small world we have gazed upon the cosmic ocean for thousands of years. Ancient astronomers observed points of light that appeared to move among the stars. What's Up in Space: Comet Catalina previews a bright future Scott Sutherland Meteorologist/Science Writer Wednesday, August 19, 2015, 3:02 PM - A celestial wanderer gives us a preview of a potentially bright future, a violent origin for one of Saturn's rings and The Martian visits NASA's Jet Propulsion Laboratory. It's What's Up In Space! Comet Catalina glows green A first-time visitor to the solar system is getting closer to its one-and-only swing by the inner planets, and even though it's still farther away from the Sun than the planet Mars, it is already showing up beautifully in telescopes.

If the Moon Were Only 1 Pixel - A tediously accurate map of the solar system Mercury Venus Earth You Are Here Moon "Autumn Star And Planets : And Why The Stars Change With The A personalized PBS video experience is only a few clicks away. Use one of the services below to sign-in to PBS, and you'll be able to manage videos in your Watchlist, keep track of your favorite shows, watch PBS in high definition, and much more! You've just tried to add this video to your Watchlist so you can watch it later.

926 FREE Speaking Worksheets Learning to speak a new language is definitely a challenge. It’s very difficult for your students to do if they don’t practice on a regular basis. Luckily, you need to look no further because has the tools to help your students practice their speaking - and want to do it, too! Let’s face it, students aren’t always jumping for joy at the opportunity to speak a language they aren’t 100 percent comfortable with. 2015 August 18 - Announcing Comet Catalina 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. 2015 August 18 Explanation: Will Comet Catalina become visible to the unaided eye? Given the unpredictability of comets, no one can say for sure, but it seems like a good bet. The comet was discovered in 2013 by observations of the Catalina Sky Survey.

How many planets are there in the solar system? - Vidéo Well, it’s hard to give an exact figure. Between 1930 when Pluto was discovered by the American Clyde Tombaugh, and 2006, there were 9 planets. Going outwards from the sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. But in 2006, another American, Mike Brown, nicknamed PlutoKiller, showed that Pluto is not the same as other planets. Why? Astronomy OLogy Photos: The first Moon Walk, Buzz Aldrin: courtesy of NASA, taken by Neil A. Armstrong, Apollo 11; Earth forming: courtesy of JSC and NASA, Apollo 17; The Sun forming: courtesy of EIT Consortium/NSSDC and NASA, SOHO's EIT EIT Asteroids flying, Ida and it's moon Dactyl: courtesy of NSSDC and NASA; Galileo Sun's nuclear energy: courtesy of EIT Consortium/NSSDC and NASA, SOHO's EIT; Colliding galaxies: courtesy of The Hubble Heritage Team/STScI/AURA and NASA, Hubble Space Telescope Center, Debra Meloy Elmegreen, Bruce C. Elmegreen, Michele Kaufman, Elias Brinks, Curt Struck, Magnus Thomasson, Maria Sundin, and Mario Klaric; Black Holes: Accretion Disk Binary System: STScI and NASA; The Center of Centaurus, E.J.

100 English Synonyms to Expand Your Vocabulary – Espresso English A synonym is a word with the same or a similar meaning as another word. For example, the words big and large are synonyms. Buy and purchase are also synonyms – although we tend to use “buy” in a more informal context, and “purchase” in a more formal context. Keep in mind that some synonyms in the list below might not be “perfect” synonyms – there may be slight differences in meaning and connotation. For example, the words smart and wise.

P/1999 R1 (SOHO) at perihelion, September 2015 – Comet P/1999 R1 (SOHO) will make its closest approach to the Sun, at a distance of 0.05 AU. From Ottawa (click to change) however, it will not be readily observable since it will be very close to the Sun, at a separation of only 2° from it. For more information about its path across the sky, see's ephemeris page for comet P/1999 R1 (SOHO). What is an asteroid? - Vidéo An asteroid is an extra terrestrial body made of rock or metal… or both. They come in all sizes. Some are as small as a potatoe; others are like mini planets, as big as a whole country.

Exploring Planets in the Classroom: Hands-on science activities Exploring Planets in the Classroom was a long-running summer workshop in Planetary Geosciences offered at the University of Hawai‘i at Manoa for the state's K-12 educators and librarians under the direction of Dr. G. Jeffrey Taylor. Hands-on activities in this course were developed and/or tested by the Hawai‘i Space Grant Consortium in cooperation with educators statewide.

Related:  Ressources en vrac