Yes, it must be possible. Is Mars the only place in the universe that has this, I wonder?
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Yes, it must be possible. Is Mars the only place in the universe that has this, I wonder?
Amazing, DW though the invention is still at its beginning. I wonder also which of these new transportation systems might substitute the obsolete car transport.
I found that interesting too:
Spots on supergiant star drive spirals in stellar wind
Date:
October 24, 2017
Source:
Royal Astronomical Society
Summary:
Astronomers have recently discovered that spots on the surface of a supergiant star are driving huge spiral structures in its stellar wind.
"Zeta Puppis is an evolved massive star known as a 'supergiant'. It is about sixty times more massive than our sun, and seven times hotter at the surface. Massive stars are rare, and usually found in pairs called 'binary systems' or small groups known as 'multiple systems'. Zeta Puppis is special however, because it is a single massive star, moving through space alone, at a velocity of about 60 kilometers per second. "Imagine an object about sixty times the mass of the Sun, travelling about sixty times faster than a speeding bullet!" the investigators say. Dany Vanbeveren, professor at Vrije Universiteit Brussel, gives a possible explanation as to why the star is travelling so fast; "One theory is that Zeta Puppis has interacted with a binary or a multiple system in the past, and been thrown out into space at an incredible velocity."
Using a network of 'nanosatellites' from the "BRIght Target Explorer" (BRITE) space mission, astronomers monitored the brightness of the surface of Zeta Puppis over a six-month period, and simultaneously monitored the behavior of its stellar wind from several ground-based professional and amateur observatories.
Tahina Ramiaramanantsoa (PhD student at the Université de Montréal and member of the Centre de Recherche en Astrophysique du Québec; CRAQ) explains the authors' results: "The observations revealed a repeated pattern every 1.78 days, both at the surface of the star and in the stellar wind. The periodic signal turns out to reflect the rotation of the star through giant 'bright spots' tied to its surface, which are driving large-scale spiral-like structures in the wind, dubbed 'co-rotating interaction regions' or 'CIRs'."
"By studying the light emitted at a specific wavelength by ionized helium from the star's wind," continued Tahina, "we clearly saw some 'S' patterns caused by arms of CIRs induced in the wind by the bright surface spots!." In addition to the 1.78-day periodicity, the research team also detected random changes on timescales of hours at the surface of Zeta Puppis, strongly correlated with the behavior of small regions of higher density in the wind known as "clumps" that travel outward from the star. "These results are very exciting because we also find evidence, for the first time, of a direct link between surface variations and wind clumping, both random in nature," comments investigating team member Anthony Moffat, emeritus professor at Université de Montréal, and Principal Investigator for the Canadian contribution to the BRITE mission."
https://www.sciencedaily.com/release...1024115613.htm
I think that is unlikely. The "sail" is driven by solar power but the size of the sail would make it impractical for auto transport. Its mainly an outer space means of propulsion.Quote:
Originally Posted by Danik 2016
It is also a very slow form of acceleration. You can't just go from standing to max speed in moments. Well suited to space travel but not on roads.
This is a good idea!
https://www.universetoday.com/137618...lpha-centauri/
They are already talking about greenhouses. I wonder if future scientists will discover any kind of vegetation.Quote:
Originally Posted by Dreamwoven
Certainly. One significant difference for me has come from this thread. When I look at the seemingly empty sky I imagine it crowded with suns, moons, planets, stars and splintered celestial bodies.Quote:
Originally Posted by Dreamwoven
I often think about how many of the planets have bits of space machinery circulating them in orbit (Ceres) - or on the surface (moon, Mars). One day, perhaps, this will become a history of space exploration.
I think that in a certain way this thread is partly documenting this history.Quote:
Originally Posted by Dreamwoven
Wow. The Solar System is shrinking to a spacial district:Quote:
Originally Posted by Dreamwoven
"Astronomers from the Minor Planet Center sent out an announcement today, hoping for astronomers to do followup observations on the comet C/2017 U1 PANSTARRS. That’s because this strange comet seems to be on a trajectory that originated outside our Solar System. Not just from the Oort Cloud, but from another star."
https://www.universetoday.com/137621...et-discovered/