On this day in 1618, Johannes Kepler formulated his Third Law of Planetary Motion. This third law states that “the square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit.”
Important stuff, this.
Here’s a video that has been floating around for the interwebs for a couple weeks. It’s freaky-cool.
STATEMENT: “Astronomical estimates of the distance to various galaxies gives conflicting data.”
RESPONSE: The source used to derive this statement is a news item from September 9th, 1995, titled “Further Evidence of a Youthful Universe” by R. Cowan. The story tells of how astronomers at the University of Cambridge in England concluded that the distance to the Coma cluster of galaxies indicates that the universe’s age is approximately 9.5 billion years as opposed to the previous estimates of 13 to 16 billion years.
However, as the news story states, “[astronomers] must either embrace a more complex cosmological model or reexamine how they estimate stellar ages.” This is exactly what they have done in the thirteen years since this story was published. Because of a refinement in the process of estimating stellar ages, astronomers have been able to narrow the estimated age of the universe. Within a well-defined error bar, astronomers are now certain that the age of the universe 13.7 billion years. The story even quotes how the study may have been inaccurate in the first place: “cautions theorist Daved N. Schramm of the University of Chicago, ‘You have to be very careful about [drawing conclusions] because all of the [Hubble constant] measurements have huge systematic errors.’”
It should also be pointed out here that “Evidence for Creation” contradicts itself by using this source. If the universe is 6,000 to 10,000 years old, as is proposed earlier (here and here and here), then using a scientific measurement that dates the universe as 9.5 billion years old contradicts the idea of a young-earth. So which is it: 6,000 to 10,000, or 9.5 billion? How about the actual 13.7 billion?
STATEMENT: “The Biblical Record refers to the expansion of space by the Creator.”
RESPONSE: The two biblical passages used as evidence for this statement are Psalm 104:2, and Isaiah 40:22. From the King James Bible, they read as follows:
Psalm 104:2 - Who coverest thyself with light as with a garment: who stretchest out the heavens like a curtain:
Isaiah 40:22 - It is he that sitteth upon the circle of the earth, and the inhabitants thereof are as grasshoppers; that stretcheth out the heavens as a curtain, and spreadeth them out as a tent to dwell in:
I shall leave it to theologians to interpret what these verses really mean, but I will comment on their use: “Evidence for Creation” is attempting, as its title implies, to provide the scientific evidence that supports the hypothesis of a universe created according to the biblical record in Genesis. However, if their “scientific” evidence for the truth of the biblical record is the bible itself, creationists are essentially saying “The bible is true because the bible says so.” Also, the bible is not a scientific work but a mythological, theological doctrine of faith. Therefore, there is no validity in using the bible as scientific evidence for anything, let alone for evidence of its own truth.
STATEMENT: ”Astrophysicist Russell Humphries demonstrates that such space expansion would dilate time in distant space.”
RESPONSE: First, “Evidence for Creation” has misspelled the physicist’s name in the article as well as in the citations. The actual name is Russell Humphreys. This will help any readers that are wanting to find a review of his book or find it on Amazon.com.
Second, Starlight and Time, Humphreys’ book cited for this statement, addresses the rather complex “Starlight Problem” that comes up when considering a young earth/universe. Essentially, the starlight problem is this: if the earth and the universe is young (less than 10,000 years old), then everything in the cosmos is within 10,000 years old; this would mean that no object that we can see could be further than 10,000 light years from Earth because otherwise we would not be able to see them; furthermore, events happening at distant galaxies (say, 150,000 light years away) that are detectable on earth (i.e. gamma ray bursts) could not have actually happened, due to the distance the light would have to have traveled (150,000 light years) in less time than the universe has existed; in this example, the gamma rays that we are detecting on earth as having come from a star or galaxy 150,000 light years away would have to have been placed 10,000 light years away from the earth and 140,000 light years away from the star or galaxy, and be on a trajectory towards the earth, at the beginning of the universe.
Did you follow all that? Basically, the starlight problem means that if the universe is truly only 10,000 years old and created by God according to the biblical record in Genesis, then God purposely set up a universe with a false history, making the universe appear as though it is older than it actually is. However, this argument is rather absurd; why would God do this? Not only that, but how do we then know that the earth is only 10,000 years old and not 100 years old with a similar false history, or 2 seconds old with a false history that includes every memory of your life up until 2 seconds ago? Ockham’s Razor, the idea that the explanation of a phenomenon should introduce as few new assumptions as possible (i.e. assuming God created the universe 10,000 years ago with a false history making the universe look older than it is), dictates that we reject this theory for the simpler idea that the universe really is as old as appears, or 13.7 billion years.
Humphreys’ book “presents a controversial cosmological model in which the Earth is several thousands of years old, but the outer edge of an expanding and rotating 3-dimensional universe is billions of years old, with various ages in between. The model places the Milky Way galaxy relatively near the center of the cosmos (in line with observable data if one disregards the Copernican Principle), though it is not a geocentricmodel of the solar system” (Wikipedia page on Russell Humphreys). In 1998, David E. Thomas wrote of Humphreys’ work, stating that “Humphreys creates a slick, scientific-sounding argument for a ‘young’ Earth, but in the process seriously misrepresents modern consensus. All serious dating methods (radiometric age dating, dendrochronology, ice core analysis, varve deposition, and more) yield ages far older than Humphreys’ methods. [...] D. Russell Humphreys breaks all the rules of science. He uses flawed logic, overly simple models, and twisted data to sell his young Earth” (“‘Creation Physicist” D. Russell Humphreys, and his Questionable ‘Evidence for a Young World’”).
STATEMENT: “This could explain a recent creation with great distances to the stars.”
RESPONSE: Sorry, but no, it cannot.
CONCLUSION: The evidence presented in this argument is so off the mark that it is barely worth considering. Astronomical estimates showing that the universe is about 9.5 billion years old that have since been overturned is not evidence for young earth of 6,000 to 10,000 years. Biblical verses cannot confirm the validity of the bible; just like I cannot confirm that I am the greatest juggler in the world by telling you that I’m the greatest juggler in the world. And oversimplified models of the universe that essentially say that the universe is set up in such a way as to fool us into thinking it is older than it actually is, or that space expansion “dilates” time in distant space (but not local?) is also not scientific evidence. The argument for creation based on the expansion of space fabric is pseudoscience at its best.
On this day in 1924, Edwin Hubble announced the existence of another galactic system in addition to the Milky Way. He had found that at least one “island universe,” or galaxy of stars, lies outside our own Milky Way. Until then, scientists were not certain whether certain fuzzy clouds of light called “nebulae” that had been seen with telescopes were small clusters of clouds within the Milky Way or separate galaxies. Hubble measured the distance to the Andromeda nebula and showed it to be a hundred thousand times as far away as the nearest stars. This proved it was a separate galaxy, as large as our own Milky Way, but very far away.
Another astronomy Science of Yesteryear, I know. But I think that this one deserved to be here simply because of the magnitude of the discovery. We now have seen and imaged hundreds to thousands of galaxies and are discovering more all the time. To think that we only discovered a galaxy outside our own 84 years ago, but now have discovered thousands, is just incredible to me.
In 1987, cosmonaut Yuri Romanenko ended his record 326-day space flight orbiting Earth in the Mir space station, landing in a Soyuz spacecraft at a snow-covered site in Kazakhstan. His stay in space broke the previous Soviet record of 237 days. For comparison, the U.S. space endurance record is 87 days. Romanenko rocketed into orbit 6 Feb 1987 with flight engineer Alexander Laveikin who suffered heart problems five months later and was replaced with Alexander Alexandrov. They conducted 1,000 experiments in biology, medicine, materials processing and geology. Romanenko and Alexandrov used the giant Kvant (Quantum) astrophysics laboratory attached to the Mir to collect data from remote parts of the solar system.
I have been listening to the Skeptics’ Guide tonight, an episode from the end of October of this year. The guest interviewee on the episode was a soil scientist working with the Jet Propulsion Laboratories’ Phoenix Mars Lander mission. As a result, I was very much looking for something space-oriented for the first Science of Yesteryear.
326 days in space = crazy, but awesome. I’m actually rather surprised that in the 21 years since this record was set it has not been broken.
Recently, it was announced that the first exoplanets had been imaged. Well, it is now quite possible that another exoplanet has been imaged.
Rather than going into detail about this, I will deflect to Phil Plait, the Bad Astronomer. Phil’s got an excellent breakdown on his blog.
“Science moves with the spirit of an adventure characterized both by youthful arrogance and by the belief that the truth, once found, would be simple as well as pretty.”
-James Watson (co-discoverer of the structure of DNA), The Double Helix (1968)
Evidence of science being “simple as well as pretty” was shown just recently when photographs of planets outside our own solar system were released by NASA and Lawrence Livermore National Laboratory. Simple in that the planetary system is much the same as one would predict given the nature of our own planetary system, and pretty because of the awesome wonderment these pictures can instill.
