caballerodiez

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?

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/

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?

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

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

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.

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

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!

Thanks!

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/#/

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?

Thanks for your answers!

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?

Anybody?

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?

I think that Alpha centauri could host the closest Earth-like planet. A study shows that 22% of G and K-type stars could have Earth-like planets orbiting in the habitable zone. There are 9 Sun-like stars within 25 light-years. If we make the calculation, two of those stars could have an Earth-like planet. One of those two exoplanets could be Tau Ceti e. Which exoplanet could be the other one? 7 out of the 9 closest Sun-like stars have low metallicity. The only two stars with high metallicity are Alpha Centauri A and Delta Pavonis, but this star is suspected to be variable. What do you guys think?

Hi, Forbes just published an article about the Habitable Exoplanet Hunting Project: http://www.forbes.com/sites/jamiecartereurope/2019/11/25/inside-the-247-search-for-another-habitable-planet-within-100-light-years-of-earth/#149fbf103442 I hope you find it interesting! We welcome any type of observatory to join us. Cheers!

As some of you probably know, the Square Kilometre Array will become the biggest radio telescope on Earth, with a collecting area of 1 square kilometre. The construction will start in 2021 and the first light is expected to take place in 2027. It will cover the frequencies from 50 MHz to 15 Ghz. But what I wanted to share with you guys is a new study about how far the SKA can 'listen'. A recent study points out that the SKA could detect extraterrestrial airport radars 200 light years away. Source: https://www.youtube.com/watch?v=ayqyb8XCtE0 What do you guys think?

In 2009, the same society together with the Tau Zero Foundation announced Project Icarus, a similar spacecraft that could achieve 15% the speed of light. That year, a physicist called Friedwardt Winterberg announced a fusion spacecraft that could be used as a capacitor to produce proton beams that would ignite deuterium micro-bombs. However, this technology would have to be constructed in space and the cost would be too expensive. For this reason, Winterberg proposes that the nuclear fuel could be ignited by Marx generators. In this line, Chief Scientist of Icarus Interstellar Adam Crowl has suggested that a two stage-configuration of the Winterberg rocket could achieve 20% the speed of light. The starship would weigh 120,000 tons, and the amount of deuterium needed would be 12,000,000 tons. It would only take around 20 years to reach the closest potentially habitable exoplanet, Proxima b. Source: https://www.youtube.com/watch?v=DT5zkUq3VDY Considering that the first nuclear fusion rocket could be ready for launch by 2028, how plausible do you think this nuclear rocket design is?

True. TESS lenses have an aperture of just 100mm (4 inches).

Hi! If you are interested in exoplanets, you might want to know these little known facts about exoplanets. Source: https://www.youtube.com/watch?v=In2DjQQ1oyc In our stellar neighborhood there might be around 130 potentially (p.) habitable exoplanets, 10 of them being Earth-like. The closest p. Earth-like planet is called Tau Ceti e, and it is located only 12 light years away from us. So far, we have sent a targeted radio message to 2 p. habitable exoplanets, Tau Ceti e and Luyten b. Any reply would be received as of 2037 and 2041, respectively. Amateur astronomers have discovered 2 p. habitable exoplanets: LHS-1140 b and K2-288 B b. It is possible to detect exoplanets by using a tele-photo lens with an aperture of less than 50 mm. Hope you learnt something knew!

Hi all! We are looking for more observatories and amateur astronomers who might want to join the project. The Habitable Exoplanet Hunting Project is a worldwide network of amateur astronomers searching for new potentially habitable exoplanets. I am coordinating over 20 observatories located in 5 continents. We are searching for habitable exoplanets around non-flare G, K and M-type stars located within 100 ly. The stars we are monitoring already have known transiting exoplanets, but none of them are potentially habitable. We are monitoring each star 24/7 for several months. By doing so, we believe that the chances of finding an exoplanet increase for particular targets. Moreover, we are focusing on stars closer than 100 light years because, on the one hand, the closest habitable exoplanets will be the first destinations of interstellar missions and, on the other, because very few nearby habitable exoplanets around G and K-type stars have been discovered: only 2 of them. The number of potentially habitable exoplanets that we could discover is, in theory, around 25. This calculation was obtained by taking into account the number of non-flare stars within 100 light years and the percentage of them that should show transits in the habitable zone. Each observatory observes the same star and, when the transit of a hypothetical habitable exoplanet becomes unlikely, we move to another star. Within 100 light years, we only found 10 non-flare G, K and M-type stars with known transiting exoplanets not potentially habitable. Big telescopes are not necessary, but CCD cameras with a resolution of at least 16 bits are advisable because we are searching for exoplanets that produce a change of brightness in the star of around 0.1%. If you are interested, feel free to contact me. More info: https://youtu.be/0A7gEaewOws

Astronomers have discovered a potentially habitable exoplanet around Teegarden's Star. Teegarden is an old red dwarf star 12 light-years away in the Aries constellation. The exoplanet found, called Teegarden b, has a minimum mass almost identical to Earth. It orbits within the star's habitable zone. And it has a 60% chance of having a temperate surface environment. Surface temperature should be closer to 28°C assuming a similar terrestrial atmosphere. Teegarden b is the exoplanet with the highest Earth Similarity Index discovered so far: 95%. This means that it has the closest mass and insolation to terrestrial values. Source: https://www.youtube.com/watch?v=eNGXerXGnjo

Hi! I would like to share with you guys some facts you might not know about antimatter: 1º - Recent studies suggest that an antimatter spacecraft could achieve up to 70% the speed of light, reaching Proxima b in just about 6 years. 2º - The maximum time that antimatter has been stored is 405 days. 3º - According to the former Fermilab physicist Gerald Jackson, antimatter rockets could become a reality by 2050. Source: https://www.youtube.com/watch?v=IIgpTrmKUZs&list=PL3RiFKfZj3ptaxqH3te_eKz1ge_CxQxjw&index=1 What are your thoughts about antimatter propulsion?