... I normally begin by asking the class what they think would be different if the Moon didn't exist, or if the Sun were closer to Earth, or if a star exploded nearby. ... The winds would be much stronger. ... In using what-if questions in the classroom, it is worth bearing in mind that students extrapolating the effects of new scenarios will encounter two different situations: direct changes to the new version of Earth and indirect changes resulting from the direct changes. ...

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Astronomy Discussion Forums . ... What Really Exists Outside The Universe . ... Post Message | ... Picture a bowl of marbles. ... Each of the spheres in your marble bowl represents a single universe. Now in reality these marble spheres exist infinitly in numbers and are not limited to some sort of cosmic bowl. ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... But there also exists a practical angle: in a world increasingly dependent on electricity and electronics, the "space weather" outside the atmosphere can have serious effects, in particular on human communications. Currently more than 200 communication satellites circle the Earth in synchronous orbit . ... For a view of NOAA's "space weather report," click here ; another such report, from the University of Michigan, is linked here . ... Another such event occured April 7-11, 1997 . ...

... Abstract Open an existing SPK file for subsequent write. ... We assume that the following variables have already been assigned the proper values: body (integer) Body code for ephemeris object. center (integer) body code for the center of motion of the body . frame (string) the reference frame of the states . first ( d.p .) first valid time for which states can be computed in seconds past 2000. last ( d.p .) last valid time for which states can be computed in seconds past 2000. gm ( ...

... AstroGrid Registry . ... 3.Get/Find New Registries . ... Below you will find sections about information about eXist and how it works with the Registry. eXist embedded (Moving your Data Out) . ... You could of course make backups of the data directory and after doing an upgrade or deploy simply copy back over the data directory and restart your servlet/j2ee container. ... Change the JNDI property of "reg.custom.exist.configuration" and point to this directory plus conf.xml ex: /exist/db/conf.xml. ...

... Edwin Hubble Discovers the Universe . ... The Early Universe . ... NEAR to an Asteroid . ... Excitement mounts as NASA's Near Earth Asteroid Rendezvous (NEAR) spacecraft nears launch - currently scheduled for 3:53 ET on February 16. NEAR's mission is to become the first spacecraft to rendezvous with and orbit an asteroid, the asteroid designated 433 Eros. ... Cold, distant, Pluto is the only planet in our Solar System which has not been visited by a spacecraft from Earth. ... The First Explorer . ...

... Astronomy index . ... This tour, of the world of astronomy, physics and spaceflight, may just as well end with a light-hearted 1878 poem by the Czech poet Jan Neruda . ... Do Frogs Exist there Too ?" . ... Like moles they dig for learning. ... They call one foot, that's all. ... Do frogs exist there too?" ... star? jim ?ab?k u?en? . ... teprv jim loket jeden. ... Foot" as used here, in Czech "loket," actually means "cubit," the distance from elbow to stretched fingertips, about a foot and a half. ...

... Tonight's Sky . ... Sky this Month . ... An artificial comet holds secrets to Earths life . ... Early Mars bombardment likely enhanced life-supporting habitat . ... The Real Reality Show: Would aliens be anything like us? ... April 2016: the historic journey to Europa . The Real Reality Show: All about the Drake Equation . ... The Real Reality Show . ... The Real Reality Show: Could Life Exist on Europa or Titan? ... Only registered members of Astronomy.com are allowed to comment on this article. ...

Program: CREATE Purpose: Creates a SET (and subsets) Category: UTILITY File: create.shl Author: K.G. Begeman Keywords: OUTSET= Name of set to create. ... N] This keyword is asked only when the set you want to create already exists. ... This item will be put in the header and will determine the coordinate system CTYPE1= Enter axis name of first axis [stop axis input] For the n_th axis the keyword will be CTYPEn=, like all the following keywords NAXIS1= Size of axis in grids. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2010 November 14 . Multiverses: Do Other Universes Exist? ... If one or more of the multiverse hypotheses is correct, then quite possibly they do. ... An entire set of parallel universes is called a multiverse . The human eye might represent the possibility that realizations of some multiverse hypotheses might only exist in the human mind . ...