Label: Not On Label - F 7068 • Format: 3x, CD Compilation, Mixed • Country: Netherlands • Genre: Electronic • Style: House, Dub, Progressive House, Tech House, Trance, Breakbeat, Downtempo
The universe tells us Beyond Centauri - Various - Timemachine story mainly through light and other wavelengths of electromagnetic radiation. We learn about the planets, stars, and galaxies by their light—visible light, and also shorter-wavelength ultraviolet and longer-wavelength infrared light, invisible to the eye but detectable by certain telescopes on Earth and in space—and by the still longer waves of radio energy that they send us.
These waves do not arrive instantaneously. Although they travel at the fastest possible speed the speed of light, they take a while to get here. The universe is big, so the news is delayed by Triple Vision - One Of Us - Blow Your Speakers Out vast gulfs of space it has to cross to reach us.
In metric units, that's aboutkilometers per second. How long does light take to reach us from familiar objects? Let's take a quick tour of the solar system, asking at each place how long its light takes to reach us here on Earth.
The closest object to us is the Moon. Its average distance is aboutmiles, so light from the Moon takesmiles Beyond Centauri - Various - Timemachine by When astronauts orbited the Moon and later walked on its surface in the 's, television viewers noticed that they were slow to answer questions transmitted from Earth.
That was because it took 1. Those 2. Not much changes about the Sun in so short a time, but it still means that when you look at the Sun, you see it as it was 8 minutes ago. Photo Photo of the Sun in hydrogen-alpha light.
The giant planet Jupiterwhose large moons Galileo discovered with his "trouble-making" telescope, is more than 5 times farther from the Sun than the Earth is. We see a planet like Jupiter because its light—which like the other planets and the Moon originates on the Sun—takes about 43 minutes to reach Jupiter. The return trip to the Earth can take from 35 to 52 minutes, depending on whether we are on the same side of the Sun as Jupiter or on the other side.
Little Pluto is so small and remote it was not discovered untilorbits 40 times farther from the Sun than we do. By the time the light reaches us, it has spread out so much that the planet looks very dim, and requires a good telescope to spot. Moving beyond the Solar System, our scale of distances and travel times needs to change. Now light will require yearsnot hours, to make its way to us. Beyond Centauri - Various - Timemachine star that is nearest to the Sun happens to Beyond Centauri - Various - Timemachine part of a system of three stars.
Unlike the Sun, which is a loner, many stars are found in groups of two, three, four or more. The brightest star in our neighbor system is called Alpha Centauri pronounced Al' fa Sen' to reeand it is a virtual twin of the Sun. Beyond Centauri - Various - Timemachine from Alpha Centauri takes more than 4 years to reach the Sun.
Astronomers use a special term for this way of measuring distance—they say the star is 4 light years away. The brightest star in our skies is the "dog star", Sirius pronounced Sea' ree us. It's the primary star in the constellation of the big dog, Canis Major. Sirius is roughly 9 light years away.
Think of what you were doing Merry Christmas All - Gene Marshall - Merry Christmas All / Christmas Day years ago. That's when the light we see from Sirius tonight first began its journey to us. Not far from Sirius in the sky is the bright star Betelgeuse pronounced Beetle' juice.
It is so far that its light takes years to reach us. Light that we see tonight from Betelgeuse left it in the late 's. In the same part constellationOrion, as Betelgeuse but even farther away is the Orion Nebulaa place where we see new stars forming.
Its distance is light years, meaning that the light we see from it left more than a thousand years before the invention of the telescope.
The farther away an object in space lies, the longer it takes its light to get to us and the older that light is when it reaches Earth. As we look deeper and deeper into the Milky Way Galaxy the island of stars in which we livewe are looking deeper into the past. Light can take tens of thousands of years or The Love Of My Life - Jorge Dalto & The Interamerican Band* - Urban Oasis to reach Warsawpack - Stocks & Bombs from distant parts of our galaxy, which is roughlylight years wide.
Once we move outside the galaxy, we encounter even larger spaces and longer light travel times. One of the great scientific ideas of the 20th century astronomy was the discovery that there are other galaxies out there—stretching as far as our great telescopes can see.
Billions of other islands of stars are scattered through the great dark ocean of space. The nearest large galaxy to the Milky Way is the Andromeda Galaxy. Sometimes astronomers call it M31, by its number in the famous Messier catalog of fuzzy celestial objects. The light we see from it tonight left it more than 2 million years ago, when our species was just beginning to establish its fragile foothold on planet Earth.
In this sense, astronomy is mostly ancient history: The farther away objects are, the older the story they have to tell us. Young people, raised on CNN, the Web, and "instant messaging" may at first bridle at the thought that the most recent information we can get from a neighbor galaxy might be 2 million years old.
But for astronomers, this delay in the arrival of light is one of the universe's greatest gifts. After all, one of the fundamental tasks of astronomy is to fill in the history of the universe—from the Big Bang to the moment you are reading this paragraph.
Astronomers might not be able to undertake such a task if the information from the universe were limited to current Beyond Centauri - Various - Timemachine. But the universe is a time machine.
Mayda from Seeing in the Dark. The double star Albireo, photographed through a telescope by Timothy Ferris from Seeing in the Darkis light years from Earth, so the light we see from it tonight was emitted in the seventeenth century.
The Orion Nebula, a glowing cloud of gas and dust, where we see new stars forming, by Rob Gendler. The Andromeda galaxy, by Rob Gendler.
Various - And All Because The Lady Loves......, Графин - П.Т.В.П. - Кровь И Сперма, Μα Τι Θέλει Η Μάνα σου - Various - Σμύρνη, El Cid - Various - Fleetwood Presents Stereo Highlights From The World Of Music