تبلیغات
Scientific - NASA interplanetary spacecraft sets record
پنجشنبه 14 مرداد 1389

NASA interplanetary spacecraft sets record

   نوشته شده توسط: فریده جلیلوند    

 

 

NASA interplanetary spacecraft sets record

 

PASADENA, Calif. (UPI) -- NASA says its ion-propelled Dawn spacecraft -- en route to explore two of the asteroid belt's most massive objects -- has set a record for velocity change

Officials said the record previously held by NASA's Deep Space 1 -- the first interplanetary spacecraft to use ion propulsion -- fell Saturday when Dawn's accumulated mission acceleration exceeded 4.3 kilometers per second -- 9,600 mph

The space agency said a spacecraft's change in velocity refers to its ability to change its path through space by using its own rocket engines. To reach its present location in the asteroid belt, NASA said Dawn had to fire its three engines -- one at a time -- for a cumulative total of 620 days. During that time, it used less than 165 kilograms (363 pounds) of xenon propellant
In one year's time, Dawn's ion propulsion system can increase the spacecraft's speed by 8,850 kilometers per hour (5,500 mph), while consuming the equivalent of only 16 gallons of fuel, NASA said

Dawn's 3 billion-mile mission includes exploration of asteroid Vesta in 2011 and 2012, and the dwarf planet Ceres in 2015

Dawn, launched in September 2007, is managed by NASA's Jet Propulsion Laboratory in Pasadena, Calif

 

ArcaMax Science & Technology Ezine


 
لبخندناراحتچشمک
نیشخندبغلسوال
قلبخجالتزبان
ماچتعجبعصبانی
عینکشیطانگریه
خندهقهقههخداحافظ
سبزقهرهورا
دستگلتفکر