Hubble data predicts Milky Way galactic collision When Galaxies Collide! It sounds like an early science fiction novel. However, analysis of Hubble measurements shows that our own Milky Way galaxy is moving toward a head-on collision with our nearest neighbor, the Andromeda galaxy (also known as M31). View all The story begins and ends with Hubble. Astrophotograph of M31, also known as the Andromeda nebula, taken using an 85mm telescope with a hydrogen-alpha filter to enhance nebulosity (Photo: Adam Evans) Hubble also demonstrated that the redshift of galaxies (first discovered in 1912 by Vesto Silpher) was proportional to their distance from our galaxy. Some 90 years later, we know that M31 is about 2.5 million light-years away, and is approaching our galaxy at about 109 km/sec. The end of the story also owes much to a different Hubble - the Hubble Space Telescope. This image describes how the transverse motion of M31 was measured by Hubble. What could be worse for the Earth than a galactic collision?
Animations Animation:Angular diameter distance scaling with curvature and lambda (&OmegaK=1-&Omegam-&Omega&Lambda, fixed &Omegamh2 and &Omegabh2) The beautiful and mysterious Fukang pallasite meteorite By Lyle Brennan Published: 15:45 GMT, 14 April 2012 | Updated: 15:45 GMT, 14 April 2012 When it slammed into the surface of Earth, there was little sign of the beauty that lay inside. But cutting the Fukang meteorite open yielded a breathtaking sight. Within the rock, translucent golden crystals of a mineral called olivine gleamed among a silvery honeycomb of nickel-iron. Cosmic wonder: Marvin Killgore of the Arizona Meteorite Laboratory lets the sun shine through a polished slice of the Fukang rock The rare meteorite weighed about the same as a hatchback when it was discovered in 2000, in the Gobi Desert in China's Xinjiang Province. It has since been divided into slices which give the effect of stained glass when the sun shines through them. An anonymous collector holds the largest portion, which weighs 925lb. in 2008, this piece was expected to fetch $2million (£1.26million) at auction at Bonham's in New York - but it remained unsold.
Hubble Wallpaper Videos See the universe come to life via animations, scientific visualizations, expert commentary, and more. Edad del Universo La edad del Universo, de acuerdo con la Teoría del Big Bang, es el tiempo transcurrido desde el Big Bang hasta el presente. El consenso de los científicos contemporáneos es de unos 13,798 ± 0,037 miles de millones de años,[1] es decir que la edad del universo está comprendida entre 13.761 y 13.835 millones de años. En la ciencia moderna el modelo más prudente (y ampliamente aceptado) de la formación del Universo es el Big Bang. La Teoría del Big Bang no especula sobre qué puede haber existido «antes», incluso si esta pregunta tiene algún sentido. Hay siempre una ambigüedad en la relatividad especial y la relatividad general definiendo de forma precisa que se entiende por tiempo entre dos eventos. ) que aparece en la métrica. Edad basada en los resultados del WMAP[editar] El proyecto WMAP de la NASA estimó la edad del Universo en: (13,7 ± 0,2) × 109 años. Esto es, el Universo tiene unos 13.700 millones de años,[2] con una incertidumbre de 200 millones de años. . y . son los más importantes. .
How much water is there on, in, and above the Earth? (Illustration by Jack Cook, Woods Hole Oceanographic Institution) More than 70% of Earth’s surface is covered by ocean, with an average depth of just over two miles (a fairly shallow depth when compared to the diameter of our planet). But how much water is there really? In this illustration, the sphere on the left represents Earth with all of the water removed. The blue sphere to the right shows the approximate volume of all of Earth’s water. Another way to think of it is that if we represented the size of Earth with a basketball, all the water on the planet would fit into a ping pong ball and the available fresh water would be smaller than a popcorn kernel. Sources include USGS and WHOI Sources :
Total Solar Eclipse 2012 photos, near Mount Carbine, Queensland, Australia November 14, Queensland, Australia Homepage Astrophotos Australia 2012 photos Purchase Photos! Total Solar Eclipse of November 14, 2012, as seen from a hilltop about 20 miles west of the Outback town of Mount Carbine, Queensland, along the Mulligan Highway (Peninsula Development Road), a road only paved in recent years. Astronomy Picture of the Day!
10 Strange Things About The Universe Space The universe can be a very strange place. While groundbreaking ideas such as quantum theory, relativity and even the Earth going around the Sun might be commonly accepted now, science still continues to show that the universe contains things you might find it difficult to believe, and even more difficult to get your head around. Theoretically, the lowest temperature that can be achieved is absolute zero, exactly ? One of the properties of a negative-energy vacuum is that light actually travels faster in it than it does in a normal vacuum, something that may one day allow people to travel faster than the speed of light in a kind of negative-energy vacuum bubble. One prediction of Einstein’s theory of general relativity is that when a large object moves, it drags the space-time around it, causing nearby objects to be pulled along as well. Relativity of Simultaneity Since this extra dimension is so small, only tiny objects, such as particles, can move along it. Antimatter Retrocausality
The Experience and Perception of Time (Stanford Encyclopedia of Philosophy) - StumbleUpon What is ‘the perception of time’? The very expression ‘the perception of time’ invites objection. Insofar as time is something different from events, we do not perceive time as such, but changes or events in time. But, arguably, we do not perceive events only, but also their temporal relations. So, just as it is natural to say that we perceive spatial distances and other relations between objects (I see the dragonfly as hovering above the surface of the water), it seems natural to talk of perceiving one event following another (the thunderclap as following the flash of lightning), though even here there is a difficulty. For what we perceive, we perceive as present—as going on right now. Kinds of temporal experience There are a number of what Ernst Pöppel (1978) calls ‘elementary time experiences’, or fundamental aspects of our experience of time. Duration The inference model may be plausible enough when we are dealing with distant events, but rather less so for much more recent ones.
Galaxy Zoo: Hubble Interactive 3D model of Solar System Planets and Night Sky - StumbleUpon