Sleteo Discovery

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

The shuttle Discovery has touched down successfully in California after the first mission since 2003's Columbia disaster.

Discovery landed at Edwards Air Force Base at around 1312 BST (0512 PST; 1212 GMT) when bad weather forced a change to the intended Florida landing site.

Columbia broke up on re-entry because of damage it sustained when foam debris fell off the fuel tank during lift-off.

On leaving Discovery, the crew went to inspect the vehicle on the tarmac.

"It's absolutely fantastic to be back on planet Earth," said Discovery's commander Eileen Collins at a post-landing press conference on Tuesday.

But the first woman to command a shuttle mission added that the crew had experienced mixed feelings: "It's a very bittersweet day for us too. We remember the Columbia crew and their families.

She added: "Our heart goes out to them as we reach a point of closure."

Nasa officials cheered and clapped as Commander Collins made a perfect landing on runway 22 at Edwards Air Force Base about 54 minutes before dawn.

Grounded fleet

The shuttle touched down at around 322km/h (200mph), deploying its parachute to slow its speed after making a 196-degree turn to align itself with the landing strip. Its steep trajectory took it over the Pacific Ocean and just north of Los Angeles.

"It's going to be really hard to top this mission," Nasa's administrator Mike Griffin told reporters at a post-launch news briefing at Kennedy Space Center in Florida, "The crew performed fantastically well."

But the mission was not a complete success. As with Columbia, foam debris broke free from Discovery's external tank during launch. On of these chunks of foam was only slightly smaller than the one that doomed Columbia and Nasa has grounded its shuttle fleet until the problem is fixed.

Officials wouldn't be drawn on when the shuttle mission - still officially slated for September - might be able to launch.

"Until we get some data back, we can't make that decision. We will fly it when it's ready to go," said the shuttle programme manager Bill Parsons.

Astronaut Steve Robinson also had to conduct an audacious spacewalk to remove two cloth gap fillers which were sticking out from beneath the vehicle.

"This is a difficult and risky endeavour," said flight director LeRoy Cain, adding: "If it was easy everyone would be doing this."

Expensive return

Commander Collins made an open plea for people to support the shuttle and Nasa's programme of space exploration: "Some people say we should stop flying the shuttle because we've had an accident - frankly two accidents - but we are people who believe in this mission and we're going to continue it.

"I ask you to please support it it's very important to us...space exploration is a fantastic part of the human experience."
At 1206 BST (0706 EST; 1106 GMT) on Tuesday, the orbiting shuttle began its return to Earth by firing its two Orbital Manoeuvring System engines for about two minutes 42 seconds at an altitude of around 329km (205 miles).

The shuttle started to experience the burning effects of the atmosphere at about 120km (75 miles) and a speed of about 27,360km/h (17,000mph), pitching down and then up so the protected underside was exposed to the most intense heating.

Under certain circumstances, the shuttle's belly can be subjected to temperatures of 1,600C (3,000F) - hot enough to melt steel. Five minutes after hitting the atmosphere, Discovery began the first of four banks from side to side in order to lose speed.

Nasa will spend about $1m on returning the shuttle from California to Florida where its launches take place. It should be back at Kennedy Space Center in nine or 10 days.

Second choice

Edwards Air Force Base was the second choice landing site. Rainstorms and lightning within 30 nautical miles (55.6km) of the Kennedy Space Center - the shuttle's "home" - forced Nasa to scrub the two available landing opportunities in Florida on Tuesday.

The situation aboard the shuttle meant Nasa were keen to bring Discovery down today.

The crew only had enough consumables, such as food and water, to take them through Wednesday. The shuttle's ability to remove carbon dioxide gas from the crew decks was also due to run down after Wednesday.

Discovery was due to land on Monday in Florida but bad visibility due to a deck of low-lying cloud forced a delay for 24 hours.
Ovde

Samo sto nigde nisu pomenuli vatru na repu,a kamoli da su objasnili(dali je od visoke temperature pri sletanju ili su instalacije nastradale).

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Ma sve je katastrofa... Dobro se zavrsilo... Ja ne razumem kako su to ranije uspevali da rade bez problema? Poslednji je leteo 1993!
Covece, ima 40 godina od sletanja na Mesec, a sad ne mogu satl da koriste...

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Pa prvo sad je posle onog čuda s kolumbijom mnogo više publiciteta oko svega ovoga. Pretpostavljam da je sad i kontrola mnogo rigoroznija. Uvek kad tražiš nešto ćeš i da nađeš... i pre su oni leteli ovako više na rizik. Osim toga ipak je to čudo četvrt veka staro. Kako običan auto izgleda posle 25 godina, a auto je ipak nesravnjivo prostiji mehanizam od šatla... Osim toga i svet se promenio... tamo šezdesetih u jeku hladnog rata manje se pazilo na bezbednost.

NASA je svi kažu prterano birokratizovana... a i budžet im je daleko od onoga što je nekad bio. Naučnici su sujetna sorta, ako im neko skreše budžet 10% oni skrešu zapinjanje na poslu za 50% :-) Niko više nema ni neku motivaciju da radi... šta je sad glamurozno u letovima šatla?

Nije ovaj let katastrofa, ali da je vreme došlo za nešto novo i to je tačno.

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Pa koliko vidim,Nasa se ustremila na Mars,Saturn i Merkur(tu je Cassini-Merkur,Spiryt i Opoturnyty-Mars,a Messenger-krece ka Merkuru),a ovo sa satlom,kao sto kaze Stane(tolika pzanja zbog Kolumbije i 2003,nije mala stvar kada se letelica raspadne pri ulasku u orbitu).

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Pa nije samo zbog Kolumbije tolika paznja bila usmjerena na Discovery. Ipak je to plod visegodisnjeg truda NASA-e i njenih strucnjaka. Gledao sam bas intervju sa jednim od inzenjera koji su radili na Discovery-u i on kaze da je to vrhunac njegovog 15-godisnjeg rada i da mu prakticno sve zavisi od uspjesnosti misije Discovery-a.
To je stvarno impresivno sa koliko truda i upornosti ljudi rade te projekte i koliko su predani tome. Naravno, ne treba sumnjati da su odlicno placeni za to.
A mediji od toga uvijek ocekuju neku senzaciju, gledao sam prenos na CNN-u i sve frka ovo - ono, ali kad je shuttle sletio jos su malo prenosili i nakon toga prestali. Nisu uopste puno snimali izlazak i utiske astronauta uzivo. Jednostavno nema tragedije, nema ni senzacije - nazalost to je tako u medijskom rijecniku....

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Bilo bi senzacije da je bilo nečeg novog... a ovako... šatl radi... i šta sad... to mu je uostalom i osnovna namena, da odleti i uspešno se vrati. Nije baš neki naučni proboj.

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Pa mozda je za njih senzacija,popravka satla "pincetom i makazama".

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

@Vladimir_Z

To je u svakom slucaju zanimljivo, plocicu koja je virila 2 cm su morali "sanirati" da se satl ne bi zagrijao prilikom vracanja na Zemlju.

• 0Niko još nije pohvalio poruku.
  Registruj se da bi pohvalio/la poruku!

Da znam,zato sam naveo pincetu(tako je uklonjena plocica).