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alberto91

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About alberto91

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  1. Hello, For those interested, I'm doing a live streaming of Tau Ceti: Hope you like it
  2. Hello, I wanted to share this interview of John Godier titled 'Is Interstellar Travel Possible?': https://youtu.be/UquRC-uMlqU What do you think? do you think it's achievable this century?
  3. 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 Clear skies!
  4. As some of you might know, I have designed a crewed interstellar spacecraft that I call Solar One. Basically, large flexible mirrors placed near the Sun would propel a one-mile light sail with a 4–crew spacecraft of 300 tons. To decelerate, an on-board compact fusion reactor would power a photon rocket placed at the front of the spacecraft that would 1) help decelerate and 2) ionize space hydrogen for the nuclear reactor. A Bussard scoop also placed at the front of the spacecraft would 1) collect those protons (ionized hydrogen) and 2) decelerate the spacecraft. Solar One would achieve an average of 22% the speed of light, which would allow the crew to reach the closest potentially habitable exoplanet in less than 19 years. Of course cryo-sleep and artificial gravity must be achieved first. Here is my paper in arXiv: https://arxiv.org/abs/2007.11474 And here a short movie of Solar One: https://youtu.be/JEf7Z_TLmgU Feedback is appreciated!
  5. Hi everybody, I would like to share with you a crewed interstellar spacecraft which I have designed and called Solar One. It employs a combination of 3 propulsion methods: nuclear fusion, beam-powered propulsion , and photon propulsion. Basically, several compact fusion reactors power a laser system that propels a huge light sail. Physicist Robert Forward already proposed in 1983 to use a 26-TW laser system to propel a 100-km light sail, a fresnel lens to focus the beam of the laser, and decelerate the spacecraft with a secondary light sail. I propose something a bit different, which is to use to use for example a 60 TW-laser to propel a 5-km light sail that would deploy from the spacecraft after the acceleration stage, use parabolic mirrors that gradually change their orientation in order to focus the laser beam, and finally use a photon rocket to decelerate the spacecraft. In theory, it could be possible to achieve 25% the speed of light, reaching the closest potentially habitable exoplanet in less than 20 years. There are of course many challenges, like building high-energy continuous-wave lasers, reducing the weight of the nuclear fusion reactors (and of course achieving effective nuclear fusion first), and minimizing the effects of zero gravity during such a long trip. What do you guys suggest to overcome these challenges? This is my paper and a short video that summarizes all.
  6. Hello, I was thinking that some of you who live in the Northern Hemisphere would like to see a live streaming of the Alpha Centauri system, so I did so: https://www.youtube.com/watch?v=PCllBPRrHUE Hope you enjoy it! Regards.
  7. 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?
  8. 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?
  9. We are about to start the 3rd campaign. We are 32 observatories now! Happy new year.
  10. 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?
  11. 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!
  12. 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?
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