Our Doors Albums Ranked article looks at one of the greatest rock bands to come out of the 1960s. Jim Morrison, Ray Manzarek, Robby Krieger, and John Densmore formed a band unlike any group that had come before and any group that had ever tried to follow. The Doors were unique in so many ways. The poetry, the vocals, and the mystique behind their lead singer, Jim Morrison, helped define the Doors as one of the leading bands of the counterculture of the 1960s. Yet, it was the powerful music on their brilliant albums that cemented their legacy in the The post The Doors Albums Ranked appeared first on ClassicRockHistory.com.

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We can only see light that has made it to our vantage point, meaning that there is a limit to how much of the universe we can see – known as the observable universe – as the light has not yet made it to us. In a static universe, the only thing stopping us from seeing those distant objects (as well as the Doppler effect) is the time it takes to get to us. In a static universe, as time went on, we would detect more and more light from distant objects and our Hubble horizon – the amount of universe we can observe – would grow. At some point in the far-off future, the rest of the universe would become observable to us. Unfortunately, we do not live in a static universe, but one that is expanding at an estimated 73 kilometers (45.3 miles) per second per megaparsec.  As the universe expands, that changes. The distance between us and all other stars increases, and our observable universe will shrink, giving us less to observe and play with as time drags on. In the universe we believe we are in, more distant objects will disappear from our view faster and faster.               For now, our observable universe will continue to grow with the light from distant stars that can reach us, but has not had the time to reach us; one estimate says that we have only observed around 43 percent of the galaxies that we will eventually be able to observe as their light reaches us.So, what is beyond the observable universe? The obvious answer to this is a big "we don't know". In fact, we will never truly know as it is, by definition, unobservable. However, that doesn't mean we can't know anything about it, nor make sensible guesses about what it contains. For a start, we can (fairly confidently) assume that there is more universe beyond what we can observe. In all directions in space, we can detect the cosmic microwave background (CMB). This is the leftover radiation from around 400,000 years after the universe began, that is faintly detectable and permeates all of the known universe. This radiation – from the first light of the universe – has been traveling to us for 13.7 billion years whichever direction we look. This tells us we are either in one typical part of a larger universe, or that we are smack bang in the middle of a universe the size of our observable universe. As well as being able to dismiss this as unlikely based on the cosmological principle – the principle that we should not assume that we occupy a privileged region within the universe – we can test this, to an extent. There is an idea (to be filed under "likely wrong, but fun to think about") that the observable universe could be bigger than the universe itself. If it were small enough, and sufficient time had passed, light from objects would reach us from several different directions. This would mean that in a flat universe, we could think we are seeing objects far in the distant reaches of the universe when really we are seeing the light of a near (or nearer) object that has reached us from the other direction.                Looking for evidence would be difficult. Say light from a galaxy took 9 billion years to get to you from one direction, and 4 billion years from another. You would see the same galaxy at two different stages of its life, making it a mammoth task to deduce that they are they are in fact the same galaxy. However, teams have looked for evidence of this in the form of duplicated circles in the CMB, though no evidence has been found to support the idea, suggesting the universe is indeed bigger than the observable universe. Assuming the universe is bigger than the observable universe, we could also be able to detect the influence of objects outside our observable universe on objects towards our observable universe's edge. To some controversy, one team has claimed to have found just this while observing distant galaxy clusters using NASA’s Wilkinson Microwave Anisotropy Probe. The team claimed to have observed movement of these clusters suggesting that they are caused by the gravitational influence of objects beyond our observable universe.“The clusters show a small but measurable velocity that is independent of the universe’s expansion and does not change as distances increase,” lead researcher Alexander Kashlinsky at NASA’s Goddard Space Flight Center in Greenbelt said in a 2013 press release, adding “the distribution of matter in the observed universe cannot account for this motion."An object large enough to create this "dark flow", as the team termed it, would imply that the universe is not uniform (on larger scales) in all directions, leading some to suggest that it is in fact evidence of another universe rubbing up against our own, and others proposing a (more likely) idea that there are errors within the observations. Dark flow remains controversial, with later studies finding evidence against the idea. Nevertheless, it could be possible in the future to detect the gravitational influence of objects beyond our observable universe. But due to the expansion of the universe and the speed limit of the universe, we will never be able to see nor influence it.All “explainer” articles are confirmed by fact checkers to be correct at time of publishing. Text, images, and links may be edited, removed, or added to at a later date to keep information current.  

It’s often said that “SOS” – the distress signal put out by troubled ships at sea – means "Save Our Souls" or "Save Our Ship”, but that’s not strictly true. When the “SOS” distress signal was first developed in the early 20th century, it was chosen simply because it had a distinctive Morse code sequence: three dots / three dashes / three dots ( ).The letters didn’t stand for anything in particular, but they were easy to send and receive in Morse code. If you’re panicking onboard a sinking ship, the last thing you want to send is a complicated code that would be tricky to tap and could be easily misinterpreted by the receiver.“SOS” only became associated with the phrases "Save Our Souls" or "Save Our Ship” after it was widely adopted. This is an example of a backronym, an existing word or phrase that's been artificially dragooned into becoming an acronym.Before introducing a universal distress signal, different countries and telecommunications organizations would use differing signals – which proved to be highly confusing and inefficient in a globalizing world. In 1904, the Marconi Company telecommunications attempted to roll out the “CQD” distress code, which meant "Seeking you. Distress!" or "All stations. Distress!" Meanwhile, the US used “NC”, which meant "call for help without delay", and European ships used a variety of different codes. To ensure doomed ships weren’t becoming “lost in translation,” the International Radiotelegraph Convention in 1906 proposed "ships in distress shall use the following signal:  repeated at brief intervals". The motion was passed and came into effect in 1908, although it took some time for the sailors of the world to take note. The first documented use of the “SOS” signal by the US was in 1909 when Theodore D Haubner signaled the distress of the SS Arapahoe steamship off Cape Hatteras in North Carolina. However, Haubner still sent the old “CQD” as well, just in case the relatively new signal wasn’t recognized. When the RMS Titanic struck that infamous iceberg on April 15, 1912, senior wireless operator Jack Phillips initially put out a “CQD” distress call. His junior, Harold Bride, jokingly suggested they should try the new “SOS” call too. “It’s the new call and it may be your last chance to send it,” Bride told Phillips, according to a New York Times report from 1912. While the cry for help was clocked by surrounding ships, it was clearly too late for the much-hyped “unsinkable ship”."SOS" is still widely recognized as a standard distress signal in the 21st century, although Morse code has long stopped being used as a means of marine communication. Nevertheless, if you are lost on a desert island with little more than a few coconuts and a bundle of palm leaves, there are worse ways to call for help. In 2020, three sailors who had been marooned on a remote Pacific island managed to attract the attention of rescuers by writing a giant SOS message along the sandy beach.