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Rocket Lab identifică cauza eșecului de rapel al lunii trecute PDF Imprimare
Luni, 03 August 2020 13:17

Rocket Lab's Electron booster during an earlier launch

Rocket Lab's Electron booster during an earlier launch

     Space startup Rocket Lab experienced a notable hiccup in early July, when one of its Electron boosters was lost on its way to orbit, along with the seven satellites onboard. The company now claims to have pinpointed the source of the problem, and has gained regulatory approval to return to the launchpad later this month.

    Following a series of early mishaps, it has been relatively smooth sailing for Rocket Lab since first reaching orbit in January of 2018. It has gone on to deliver satellites to orbit for NASA, DARPA and the US Air Force, and even started to explore methods of recycling its rockets after launch .

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Stea asemănătoare Soarelui PDF Imprimare
Joi, 02 Iulie 2020 18:49

                             Artist's impression of the exposed core being bathed in radiation from its parent star

   Artist's impression of the exposed core being bathed in radiation from its parent star

    Astronomers have discovered the intact, exposed core of a gas giant locked in a close orbit around a Sun-like star. The discovery will give astronomers a rare opportunity to probe the heart of an ancient alien world, and their findings could tell us more about what lies at the heart of the gas giants in our own solar system, including Jupiter and Saturn.

The core was discovered by NASA’s Transiting Exoplanet Survey Satellite (TESS), which is designed to observe a vast swathe of the night sky and look out for the tiny dips in starlight that occur as planets pass between the telescope and a distant star’s surface.

 

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Global Goal: Unite for our Future” - The Summit PDF Imprimare
Luni, 29 Iunie 2020 17:51

                                

   The ‘Global Goal: Unite for our Future'pledging summit organised today by the European Commission and Global Citizen mobilised €6.15 billion in additional funding to help develop and ensure equitable access to coronavirus vaccines, tests and treatments. The money raised will also support economic recovery in the world's most fragile regions and communities.

This amount includes a €4.9 billion pledge by the European Investment Bank, in partnership with the European Commission, and €485 million committed by EU Member States. This brings total pledges under the Coronavirus Global Response pledging marathon, launched by European Commission President Ursula von der Leyen on 4 May, to €15.9 billion.


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Hidden pattern discovered in repeating radio signal from space PDF Imprimare
Joi, 11 Iunie 2020 16:07

                        A strange repeating radio signal from space has now been found to have a cycle

          New clues have been uncovered in the mystery of fast radio bursts (FRBs) from space. One of these strange signals has been repeating seemingly at random – but with years of observation, an international study has now found a pattern hidden in the noise, which could help reveal what causes them.

FRBs are hugely energetic pulses of radio that last mere milliseconds. Many of them are one-off events, gone in a flash never to be heard from again, while others repeat at random intervals. Or so we thought.

 

As the first repeater to be found, FRB 121102 is arguably the most famous FRB. Sometimes it whips into a frenzy, firing off dozens of bursts within hours of each other, while other times we won’t hear a peep out of it for months.

 

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COLONIE PDF Imprimare
Marţi, 09 Iunie 2020 12:00


        

                                     


    

Termenul „colonie” se poate referi la:

  • un teritoriu dependent de un stat colonial
  • colonie romană, o provincie sau teritoriu de graniță militar
  • teritoriu de emigrare a unei părți din populație în afara granițelor țării de baștină

   Colonialismul este o formă de dominație ideologică, politică sau culturală a unui stat asupra unui teritoriu (numit deobicei „colonie”), care atrage după sine și o stare de dependență economică a coloniei respective.

Colonialismul constă în dobandirea, organizarea, exploatarea, menținerea si expansiunea de colonii într-un teritoriu de către o putere politică dintr-un alt teritoriu. Reprezintă un sistem de relații inegale între puterea colonială și colonie și deseori între coloniști și populația indigenă.

Primele colonizări de teritorii au apărut încă din antichitate. Colonizarea de după perioada marilor descoperiri geografice din timpul lui Columb (1492), Magellan sau Vasco da Gama are o formă nouă, care durează până la sfârșitul celui de-al Doilea Război Mondial. Această formă de colonialism este pregnant legată de ideologia imperialistă. Pe plantațiile din colonii, plantatorii au folosit o perioadă munca ieftină a sclavilor.

 

 

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