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  1. Summary: - Solar One: part light sail, part laser system, part nuclear reactor, could theoretically reach 22% the speed of light. - The proposed spacecraft would be a combination of 3 near-tearm technologies, such as the US Navy's compact fusion reactor. Source: https://www.popularmechanics.com/space/deep-space/a34907687/solar-one-radical-spacecraft-crewed-interstellar-travel-light-sail-fusion-reactor/ How would you overcome the challenges involved?
  2. In this paper it is presented the concept and design of a new type of spacecraft that could be used to make the first manned interstellar travel. Solar one would integrate three near-term technologies, namely: compact nuclear fusion reactors, extremely large light sails, and high-energy laser arrays. A system of lenses or mirrors to propel the sail with sunlight is suggested as an alternative to laser propulsion. With a mile-long light sail, Solar One could reach an average of 22% the speed of light, arriving to the closest potentially habitable exoplanet in less than 19 years with the help of a Bussard scoop producing reverse electromagnetic propulsion. Key challenges are reducing the weight of continuous-wave lasers and compact fusion reactors as well as achieving cryo-sleep and artificial gravity. Source: https://commons.erau.edu/ijaaa/vol7/iss4/6/
  3. Hello, I recently wrote a paper (which I present here https://youtu.be/DbxH_E8Iy1U) suggesting which star has the highest probability of being the source of the WOW! Signal. Do you think that we should reply to the WOW! Signal or not?
  4. Hello! I was recently interviewed by the Interplanetary Podcast regarding Solar One, a crewed interstellar spacecraft that I propose. For those interested, this is the podcast: https://www.interplanetary.org.uk/post/197-solar-one-alberto-caballero
  5. Hello! NASA just released a new app where anybody can search for exoplanets. I thought it was a good idea to make a video-tutorial showing how to use it, so here it is: https://youtu.be/qeSnLchcb6c
  6. I would like to know your opinion about this. Do you think we should try to contact aliens? I think it's safe as long as we choose stars as old as the Sun or younger. I also think that, if a nearby civilization hasn't contacted with us yet, it's probably because they don't have the means to do so. Actually, according to Claudio Maccone, there are probably no advanced civilizations within 500 light years. There is an organization called METI, that tries to message extraterrestrial intelligence. More info here.
  7. So far, we have only discovered one exoplanet in the triple star system of Alpha Centauri: Proxima b. I think it is highly likely that there are more exoplanets in that system. What are your thoughts? I think this live streaming of Alpha Centauri might motivate you: http://www.youtube.com/watch?v=PCllBPRrHUE
  8. Guys, I made a short video that some of you might find helpful, especially these times. At least it was helpful for me while I was making it. Just some cinema shots with some music; I just put them together. Here it is: https://www.youtube.com/watch?v=5n9Cfm8NrLk&feature=youtu.be Stay safe!
  9. Book ''Is there life out there?'', by Sara Seager: https://www.saraseager.com/wp-content/uploads/2016/08/book-is-there-life-out-there.pdfPlaylist on Exoplanets: https://www.youtube.com/watch?list=PL3RiFKfZj3psFWv83bbwYMuy88eQzCoHC&v=7UJEPKLmznk&feature=emb_titleSearch for exoplanets online: https://www.zooniverse.org/projects/nora-dot-eisner/planet-hunters-tess/classify AND https://www.zooniverse.org/projects/ianc2/exoplanet-explorers/classifySpace movie ''Prospect'': https://ww7.123moviesfree.sc/mov/prospect-2018/watching.html/?ep=7NASA app Eyes on Exoplanets: https://exoplanets.nasa.gov/eyes-on-exoplanets/#/
  10. Hi, I would like to share with you guys a couple of interesting simulations. This simulation belongs to an Earth-like planet located 4 light-years away, imaged with the European Extremely Large Telescope (ELT), expected in 2025: This other simulation belongs to an Earth-like planet located 40 light-years away, imaged with the Large Ultraviolet Optical Infrared Surveyor (LUVOIR), expected in 2035: Source: https://www.youtube.com/watch?v=HEU0gL6ONvg What is the first exoplanet you would like to see an image of?
  11. Here some mind-blowing possibilities about super habitable exoplanets: 1. The colour of the sky could be light blue, similar to the colour of the sky on Earth in summer. 2. The oceans could be shallow, with a turquoise blue colour. 3. The vegetation could cover more regions than in Earth, and the colour of the trees could be purple. Do you agree with these hypotheses?
  12. I would like to talk about an instrument that has been sometimes overlooked: ESPRESSO. As most of you probably know, ESPRESSO is the only current spectrograph able to detect Earth-sized planets. I think it will be a key instrument for 2 reasons: 1- The majority of the most potentially habitable exoplanets were discovered with the radial velocity method. 2- Only 0.5 % of the Earth-like planets in the Milky Way could be detectable by using transit photometry. Do you think we will find a nearby Earth 2.0 with ESPRESSO in 2020?
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