The Enzmann Echolance: Reach for the Stars

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Letter of recognition, US Senator Susan Collins, August 2003: Congratulations for acceptance of artwork by MDA begin{align} x Have been getting ready for, and attending, “Starship Century”, so I have missed reading this post.

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 Certificate of Recognition of Achievement Award, Maine Legislative Sentiment sponsored by State Senator W. Tom Sawyer, January 2003: Congratulations for artwork accepted by MDA, recognition of efforts as art teacher with neuromuscular disease, and completion of Associates Degree Question. Is this down scalable to probe size? Instead of a manned 30 kton ship, we use a 30 ton probe, with far less fuel and mass. Or is the scale of the ship a requirement of the propulsion technology? 60 years plus data transmission time at the target might be within the possible horizon of a science/exploration mission for some societies. Q: If neither of these options works, Kepler is still an amazing space instrument. Could it conduct other types of experiments? 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.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. a b c "Publication: Analog Science Fiction/Science Fact, October 1973". Analog Science Fiction/Science Fact. Vol.92, no.2. pp.21–22. 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.

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. 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. 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 yields Engineers of the project would be able to say whether you could do any of this, especially having an independent unit work without some minimal mating with the scope’s electronics. In any case, one could even make a contest for this repair mission if, indeed, Kepler is dead-in-the-water, not re-purposed or fixed. If doable, then perhaps this mode of repair could keep Kepler going for many years. And I bet Musk could get a souped-up Falcon out there on the cheap.Describe the Galilean transformation of classical mechanics, relating the position, time, velocities, and accelerations measured in different inertial frames Special Recognition Award Listen & Be Heard: Arts, Culture, and Entertainment Magazine, November 2006: For contribution of articles and workshops on symbolism The ball of frozen deuterium would fuel thermonuclear-powered pulse propulsion units, similar to Project Orion engines. The spacecraft would be assembled in Earth orbit as part of a larger project preceded by interstellar probes and telescopic observation of target star systems. The rest of the spacecraft would be attached behind the ball as a seamless metallic fuel tank. The proposed method of tank construction would be to expand a plastic balloon in space and coat it with metal. Honor cords, Dean’s list, and Certificate of Achievement for the John Blodgett Memorial Scholarship Award, University of Maine, Augusta

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? NASA officials announced Wednesday, May 15, that the Kepler space telescope — the agency’s primary instrument for detecting planets beyond our solar system — had suffered a critical failure and could soon be shut down permanently. The spacecraft would be modular, and the main living area would be three identical 300 feet (91m) wide and long cylindrical modules. [3] The Enzmann could function as an interstellar ark, supporting a crew of 200 but with space for expansion. [1] Derive the corresponding Lorentz transformation equations, which, in contrast to the Galilean transformation, are consistent with special relativity Forward: The Craftsman’s Symbology, Selected Symbols of the Entered Apprentice Degreeby Anthony MongelliA: 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. 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. 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. 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.

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. Because Stine thought in terms of ships traveling together, his ultimate expedition would be about the size of a small city of 20,000 or so dispersed through ten starships. Modules and sub-modules could be disassembled during cruise if necessary and attached to another ship, with all parts designed to be interchangeable. Each ‘star fleet’ would launch what Stine called ‘metaprobes’ to move ahead of the main body for advanced reconnoitering of the target. newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\) Certificate of Appreciation from the Muscular Dystrophy Association, January, 2003: For artistic contribution 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.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. Implicit in these equations is the assumption that time measurements made by observers in both \(S\) and \(S'\) are the same. That is,