CAPE CANAVERAL // An unmanned cargo ship pulled away from the International Space Station last week to stage the first of three planned Nasa experiments on how big fires grow in space, an important test for astronaut safety.
Previous experiments in space were limited to the incineration of samples no bigger than an index card, said David Urban, lead researcher for the Spacecraft Fire Experiment, or Saffire.
“We tried for years to find a vehicle and a circumstance where this would work and initially we would get a ‘not on my spacecraft’ reaction,” he said.
Nasa ultimately settled on using an Orbital ATK Cygnus cargo ship, which is designed to burn up in the atmosphere after leaving the space station.
The Cygnus spacecraft, which left last Tuesday, was launched from Earth in March with more than 3,200 kilograms of food, supplies and science experiments for the station, a research laboratory that flies about 400 kilometres above the planet.
The cargo included Saffire, a module containing a sample of cotton and fibreglass measuring 97 centimetres by 49cm that will be set on fire after Cygnus reaches a safe distance from the station.
The experiment will begin with hot wires igniting the sample. Air flowing through ducts will fan the fire, which is expected to last about 20 minutes.
“One of the big questions is how big will the flame get?” Dr Urban asked.
Fire behaves differently outside the Earth’s atmosphere, so scientists want to test whether microgravity will limit flames and what materials will burn.
The question is not academic. In February 1997, an oxygen-generating canister aboard the Russian Mir space station erupted into a searing flame, blocking the crew’s path to an emergency escape ship.
The crew fought the fire with foam extinguishers and water and the blaze eventually burnt itself out, leaving a thick residue of soot.
The Saffire experiment will be the largest fire set in space since the accidental blaze on Mir.
Onboard sensors will record temperature, oxygen and carbon dioxide levels, while two cameras snap pictures. The data and images will be relayed to ground control teams.
Nasa plans two more Saffire experiments aboard future Cygnus spacecraft.
* Reuters
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Engine: 1.5-litre turbo
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Torque: 230Nm
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TWISTERS
Director:+Lee+Isaac+Chung
Starring:+Glen+Powell,+Daisy+Edgar-Jones,+Anthony+Ramos
Rating:+2.5/5
if you go
The flights
Fly to Rome with Etihad (www.etihad.ae) or Emirates (www.emirates.com) from Dh2,480 return including taxes. The flight takes six hours. Fly from Rome to Trapani with Ryanair (www.ryanair.com) from Dh420 return including taxes. The flight takes one hour 10 minutes.
The hotels
The author recommends the following hotels for this itinerary. In Trapani, Ai Lumi (www.ailumi.it); in Marsala, Viacolvento (www.viacolventomarsala.it); and in Marsala Del Vallo, the Meliaresort Dimore Storiche (www.meliaresort.it).
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Quick facts
- Storstockholms Lokaltrafik (SL) offers free guided tours of art in the metro and at the stations
- The tours are free of charge; all you need is a valid SL ticket, for which a single journey (valid for 75 minutes) costs 39 Swedish krone ($3.75)
- Travel cards for unlimited journeys are priced at 165 Swedish krone for 24 hours
- Avoid rush hour – between 9.30 am and 4.30 pm – to explore the artwork at leisure
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Sarfira
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KEY DATES IN AMAZON'S HISTORY
July 5, 1994: Jeff Bezos founds Cadabra Inc, which would later be renamed to Amazon.com, because his lawyer misheard the name as 'cadaver'. In its earliest days, the bookstore operated out of a rented garage in Bellevue, Washington
July 16, 1995: Amazon formally opens as an online bookseller. Fluid Concepts and Creative Analogies: Computer Models of the Fundamental Mechanisms of Thought becomes the first item sold on Amazon
1997: Amazon goes public at $18 a share, which has grown about 1,000 per cent at present. Its highest closing price was $197.85 on June 27, 2024
1998: Amazon acquires IMDb, its first major acquisition. It also starts selling CDs and DVDs
2000: Amazon Marketplace opens, allowing people to sell items on the website
2002: Amazon forms what would become Amazon Web Services, opening the Amazon.com platform to all developers. The cloud unit would follow in 2006
2003: Amazon turns in an annual profit of $75 million, the first time it ended a year in the black
2005: Amazon Prime is introduced, its first-ever subscription service that offered US customers free two-day shipping for $79 a year
2006: Amazon Unbox is unveiled, the company's video service that would later morph into Amazon Instant Video and, ultimately, Amazon Video
2007: Amazon's first hardware product, the Kindle e-reader, is introduced; the Fire TV and Fire Phone would come in 2014. Grocery service Amazon Fresh is also started
2009: Amazon introduces Amazon Basics, its in-house label for a variety of products
2010: The foundations for Amazon Studios were laid. Its first original streaming content debuted in 2013
2011: The Amazon Appstore for Google's Android is launched. It is still unavailable on Apple's iOS
2014: The Amazon Echo is launched, a speaker that acts as a personal digital assistant powered by Alexa
2017: Amazon acquires Whole Foods for $13.7 billion, its biggest acquisition
2018: Amazon's market cap briefly crosses the $1 trillion mark, making it, at the time, only the third company to achieve that milestone