One Bit News - Technology - Week 3
7 years ago in #norway by onebitnews (64)
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Lurer på om ikke jeg ville tatt med meg kålrabistappe, avocado, Bitcoin og mobilen min. Tinder også? 🤣🤣
Jasså, Tinder, Er du på jakt?
Du glemt vel litt STEEM også @Susanne :)
Tenker det kunne blitt en del gode poster her på Steemit hvis vi alle postet fra Mars en gang.
Mvh
@Gyldenhorn
for
@Onebitnews
Hello,
In the context of the subject of spatial tchnology, I want to speak in this post about The solar sail :
New type of space propulsion: this technology uses the pressure exerted by photons on a large reflecting surface to provide thrust.
The solar sail, or photovoile, is a project dating from 1970. It is a device allowing a spacecraft to be propelled using the radiation pressure emitted by the stars (and not to help of solar winds whose thrust is negligible), as does sailboat, thanks to the wind. This technology has recently been successfully tested in the design of probes, such as IKAROS or Nanosail-D2, launched in 2010. However, some engineers and scientists believe they can apply this technology to interstellar travel.
How does the solar sail work?
The solar sail, besides the use of the gravitational force, is propelled by the radiation pressure emitted by the stars, having for origin the transfer of the impulse of the photons which come to strike its sail. Therefore, the more this sail is large and reflective, the more it returns photons and the greater the propulsion force. By tilting the sail, it is possible to modify the surface offered to the light and thus to regulate the thrust and to direct the craft. However, this thrust is very weak. It would allow for example a sail of 800 m side and 2.5 microns thick to navigate, in our solar system, at a speed ranging from 5 km.s-1 to 25 km.s-1, depending from the distance of the Sun. At such a speed, variable depending on the distance to the star, the solar sail would reach Gliese 581 in nearly 410,000 years.
In the hypothesis that the sail always has the radiation pressure emitted by a star, its thrust, as small as it is, would allow it to move considerable masses, possibly several tons, over long distances. perfectly to interstellar travel.
So some scientists have thought to propel the solar sail using powerful lasers using solar energy, one being placed near the sun (to enjoy its abundant energy), the other placed near the Earth . These lasers would use, in order to focus the beam on the sail, gigantic lenses of 100 km in diameter. They would thus allow the solar sail to reach a speed of 60 000 km.s-1 (0.2 c).
In order to optimize the speed, the solar sail must be as light and thin as possible, while being strong and resistant, because the lower the mass per unit area of the sail, the greater the acceleration experienced (for the total surface area ) is high.
Trur eg hadde teke med meg ei steinhakke, for eg tippar det blir ein del graving der borte. Det var jo ei sak for eit år eller to sidan med (minst) ein nordmann som var på intervju for å evt bli med til Mars. Lurer på kva som skjedde der, og om kandidatane er plukka ut. Google next...
Kan vel sikkert være greit å grave seg ned med tanke på stråling osv ja.
Jeg tror han nordmannen fortsatt er i loopen, men at selve prosjektet er treigt.
De har vel ikke trukket de som skulle dra ennå.
Hvis jeg kan komme med ett forslag @Driftnerd så hadde jeg holdt en knapp på SpaceX ang hvem som kommer til Mars først.
Mvh
@Gyldenhorn
for
@Onebitnews
Why is the planet Mars red?
In the sky, the planet Mars appears as a red star. A color that she owes to her soil composed mainly of iron oxide.
Mars is one of five planets visible to the naked eye. Thus, in ancient times already, the Romans had found in the sky the red color so special of the fourth planet of the Solar System. Translating his color as the result of blood spilled on huge battlefields, they chose to give him the name of their god of war.
A red planet like rust
Today, we know that no bloody war has taken place on the floor of the Red Planet. If Mars appears to us so tinted, it is because its soil is rather largely composed of iron oxide: rust, so to speak.
Indeed, more than 3 billion years ago, when it was not red at all, the planet would have experienced a solar event having literally blown its atmosphere. Particularly tenuous, it then slowly oxidized a Martian soil rich in iron.
Mars is also smaller in diameter and mass than earth. In turn that means that it can't hold on to an atmosphere very well because it's got a weaker gravity field.
Yes it's true, its diameter is: 6,779 km, that of the land is: 12,742 km.
NASA offers Internet users a one-way ticket to Mars. This is a formal invitation from the US Space Agency, just to take a little height. On the occasion of the next American Martian mission, called InSight and whose departure was postponed until May 2018, Internet users from all over the world are invited to register on a dedicated site to board the new exploration module of the Red Planet.
A journey of 485 million kilometers
Happy travelers can even accumulate "miles" or miles of flying if they participate in various NASA missions. Too bad they are not recognized by aircraft manufacturers, since the robot module of InSight will take about 485 million kilometers to reach its destination.
His mission will be to study the seismic activity of Mars for two years. By drilling the planet's soil to depths of five meters, researchers hope to determine whether the planet's nucleus is solid or melting like the Earth's, and to understand the mechanisms involved in the formation of rocky planets.
Americans register in numbers
Until the big departure, NASA continues its communication operation by publishing an interactive map that indicates by country the number of participants in this scientific project. With 37,000 registered, France is in the good European average. The African continent is also passionate, but to a lesser extent, for the mission. The greatest enthusiasm is coming from the United States, where more than 450,000 Martian explorers have wanted to mark this new chapter in the history of space conquest.
Hi @redouanemez
The next 20 years will be extremely exiting for us who like space tech.
Cant wait to see the first "live" television broadcast from the red plant.
Best regards @erlendgroseth
for @onebitnews
Yes it will be really exciting, it's difficult but nothing is impossible.
Haha wow for en artikkel, Mars og månen var kun en drøm en gang i tiden, det som er drømmer nå vil bli til virkelighet. Sånn har det alltid vært. Det er utrolig hva vi mennesker har fått til og kommer til å oppdage i framtiden. Så mye vi enda ikke vet så mye og finne ut av. Om det ikke allerede finnes Marsboere så kommer det nok til å gjøre det.
Hei @meldesixym
Det er ikke mer en drøyt 100 år siden menneskeheten fløy sine første 12 meter, snaue meteren over bakken. De neste 100 årene var romfart så kostbart at bare de rikeste nasjonene kunne delta. Nå ser vi en endring mot at private selskaper kan gjøre sitt inntreden. Det vil komme til å akselerere utviklingstempoet yttligere.
GoPro og kakao var kreativt. Ikke helt sikker på om kakaobønner kommer til å bli prioritert i drivhusene på Mars med det første, så den bør du nok ta med hjemme ifra. ;)
Hilsen @erlendgroseth
for
@onebitnews
Det er utrolig at vi har utviklet oss så mye på bare 100 år, tenk om 100 år og 100 år til da. Om vi er heldig så blir vi kanskje gjenfødt på enten denne planten eller Mars og får oppleve framtiden uten å være klar over at vi noen gang har eksistert før.
Skulle tatt med noen å skrive på også, slik at jeg kunne notert ned hva jeg følte på et hvert tidspunkt og hvordan det var å være på en annen planet. Det å fantasere om å være på en annen planet er bare fantasi, men det å oppleve det må være virkelig spesielt.
Vi er egentlig ganske små når du ser verden fra et annet perspektiv.
@meldesixym
Så sant.
Mvh. @erlendgroseth
for @onebitnews
If I were going to Mars I would bring photos of my family and friends, plenty of booze and cigars to celebrate the journey with my new friends.
Hello @Tbnfl4sun
I can share some of my booze also :)
Kindest regards
@Gyldenhorn
for
@Onebitnews
Jeg blir med til Mars på en betingelse: At jeg slipper å ha med Musk ;-)
@funkit
Haha, hva har han gjort for noe galt da?
Han prøver å få til noe i alle fall. :)
Mvh. @erlendgroseth
for @Onebitnews