The Enzmann Echolance: Reach for the Stars

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Kepler has done what the program managers said it would do, and that is to give us an inventory of extrasolar planets. It completed its primary observation phase, and had entered its extended science phase. We’re already in the gravy train period — there’s still a year and a half’s worth of data in the pipeline that scientists will analyze to identify other candidate planets, and there will continue to be Kepler science discoveries for quite some time. a b c "Publication: Analog Science Fiction/Science Fact, October 1973". Analog Science Fiction/Science Fact. Vol.92, no.2. pp.21–22.

newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\) Explain the Lorentz transformation and many of the features of relativity in terms of four-dimensional space-time Working off the Enzmann specs as per kelvin Long, the starship would reach Alpha Centauri in 60 years, traveling most of the way at 0.09c. If that was really possible, that seems to me to be starting to get into the realm of the possible, rather than fantastic. A 60 year flight, in 1 g. might be survivable. A few tons of food and O2 per crew member/year might be an easier way to go than full recycling, if food can be made shelf stable for a century or more. I mentioned yesterday that Freeman Dyson, a major player in the Orion research, would go on to publish a 1968 paper that took Orion to the next level, using thermonuclear devices to drive the spacecraft. Dyson’s ultimate craft was capable of speeds of 10,000 kilometers per second, enabling a mission to Alpha Centauri with deceleration at the destination in 130 years. I imagine it was Dyson’s starship that fired the imagination of Robert Duncan-Enzmann, then at Raytheon Corporation, leading to a modified and extended Orion that Stine would use in his article.

Another question – if the deuterium is frozen, dies it even need to be enclosed in a “tank”. Would a lightweight mesh do? I assume the deuterium acts as a shield. Would it also not be better to have the crew compartment contained within the tank to act as a cosmic radiation shield, or is the crew compartment mass sufficient for that already? It will be very sad if it can’t go on any longer, but the taxpayers did get their money’s worth. Kepler has, so far, detected more than 2,700 candidate exoplanets orbiting distant stars, including many Earth-size planets that are within their star’s habitable zone, where water could exist in liquid form. An event is specified by its location and time \((x, y, z, t)\) relative to one particular inertial frame of reference \(S\). As an example, \((x, y, z, t)\) could denote the position of a particle at time \(t\), and we could be looking at these positions for many different times to follow the motion of the particle. Suppose a second frame of reference \(S'\) moves with velocity \(v\) with respect to the first. For simplicity, assume this relative velocity is along the x-axis. The relation between the time and coordinates in the two frames of reference is then

What I like about fusion engines is that refueling is relatively easy – mine comets/icy bodies and extract the deuterium, allowing further flights, and/or return to earth. As for scaling down, if you ever manage to read the original essay by Stine, he was proposing one stage of the initial probes to have small payloads – but to reach the speeds he wanted, the mass ratio was +1,000. Thus the launch mass was ~1,000,000 tonnes, with multiple stages. I mentioned at the outset of this series on 1970s starship projects that among some designers, at least, it was a time of immense optimism. We saw that in Bob Forward’s aggressively ambitious plan for exploration as presented to a subcommittee of the U.S. House. We also see it in spades in Stine’s thinking, making this theme a good note on which to close. Stine believed interstellar travel was possible through the laws of known physics and that it would not involve one-way trips but continued waves of exploration with frequent return to Earth. He goes on: Honor cords, Dean’s list, and Certificate of Achievement for the John Blodgett Memorial Scholarship Award, University of Maine, Augusta We can obtain the Galilean velocity and acceleration transformation equations by differentiating these equations with respect to time. We use \(u\) for the velocity of a particle throughout this chapter to distinguish it from \(v\), the relative velocity of two reference frames. Note that, for the Galilean transformation, the increment of time used in differentiating to calculate the particle velocity is the same in both frames, \(dt = dt'\). Differentiation yieldsDescribe the Galilean transformation of classical mechanics, relating the position, time, velocities, and accelerations measured in different inertial frames a b c d e f Long, K. F. (25 November 2011). Deep Space Propulsion: A Roadmap to Interstellar Flight -- Chapter 11.4: The Enzmann Starship. doi: 10.1007/978-1-4614-0607-5. ISBN 9781461406075. LCCN 2011937235. It’s important to make clear, though, that in the original queue of missions aimed at finding life elsewhere, a mission like Kepler was a survey mission to establish the statistical frequency of whether these planets are rare or common. It lived the length of its prime mission, and was extremely successful during that time at achieving this goal. It has paved the way for additional missions, such as TESS — Transiting Exoplanet Survey Satellite — and TPF — Terrestrial Planet Finder — which will continue the search for Earth-like exoplanets in the near future. begin{align} x &= x' + vt \label{eq1} \\[4pt] y &= y' \label{eq2} \\[4pt] x &= z'. \label{eq3} \end{align} \] Sedjak “Its just a thought, and probably thought of to some degree by many, but why not send a robotic probe(s) to Kepler with a self-contained reaction wheel(s)/solar panel/sighting/guidance/communications assembly. ” Sending such a device requires R&D for the device plus the launch cost. It is likely much cheaper to produce a second kepler spacecraft, based on the original design. Actually, mass-producing the original spacecraft would have been the cheapest option.

A: People have asked about using it to find near-Earth objects, or asteroids. Kepler carries a photometer, not a camera, that looks at the brightness of stars, and so its optics deliberately defocus light from stars to create a nice spread of light on the detector, which is not ideal for spotting asteroids. Derive the corresponding Lorentz transformation equations, which, in contrast to the Galilean transformation, are consistent with special relativity

The Symbologist Michelle Snyder

Crowl, Adam; Long, K; Obousy, R (2012-06-01). "The Enzmann Starship: History and Engineering Appraisal". Journal of the British Interplanetary Society. 65: 185. Bibcode: 2012JBIS...65..185C. Implicit in these equations is the assumption that time measurements made by observers in both \(S\) and \(S'\) are the same. That is, The other scheme, and this has never been tried, involves using thrusters and the solar pressure exerted on the solar panels to try and act as a third reaction wheel and provide additional pointing stability. I haven’t investigated it, but my impression is that it would require sending a lot more operational commands to the spacecraft.

begin{align} xForward: The Craftsman’s Symbology, Selected Symbols of the Entered Apprentice Degreeby Anthony Mongelli Sources conflict about the projected speed, perhaps 30% of the speed of light, c, but 9% may be more likely. At 30%, relativistic effects between people on Earth and on the spacecraft, such as time dilation would become more noticeable, such as the shipboard time being less than the Earth observed time. A: As I said earlier, there is still a year and a half’s worth of data in the pipeline to analyze to identify candidate planets, so there are still discoveries to be made. Whether or not it could function as a detector for asteroids is something that would have to be studied, but since it wasn’t built as a camera, I would say that I’m skeptical. That said, certainly between Ames Research Center and the Jet Propulsion Laboratory, they’ve got the best people in the world working on it. Image: The Enzmann starship as envisioned by the space artist David Hardy. This painting was commissioned by Kelvin Long in 2011 to depict a scene Hardy had first painted in the 1970s.