BAIKONUR, Kazakhstan — As a Russian Soyuz spacecraft rose into the bright blue sky yesterday, spectators held their breaths, South Koreans celebrated their first astronaut, and the astronaut’s mother fainted.

The flight itself — launched from the same pad that sent Yuri Gagarin and Sputnik into space — seemed flawless. The spacecraft lifted off within seconds of its scheduled departure and delivered its crew into orbit about 10 minutes later.

Russia’s space scientists and engineers, who struggled for over a decade after the collapse of the Soviet Union, seem to have made the risky business of sending people into orbit almost routine.

“Everything goes like Swiss watches” on Soyuz flights, the head of the European Space Agency’s Moscow office, who has witnessed a number of launches at the Baikonur Cosmodrome, Christian Feichtinger, said.

A zipper broke yesterday on the space suit of Sergei Volkov, 35, the commander of the Soyuz mission, but the suit passed a pressure test and he was cleared for flight.

The Soyuz spacecraft is scheduled to deliver Mr. Volkov, cosmonaut Oleg Kononenko, 43, and a 29-year-old South Korean bioengineer, Yi So-yeon, to the international space station Thursday.

Despite the seeming routine, the sight of the 164-feet-high rocket arcing through the cloudless sky still stirred deep emotions.

Relatives, friends, and colleagues stood in silence watching the huge vehicle rise as though weightless from the launch pad. The ground shook and the roar of the engines made conversation impossible more than a mile away.

Moments later Ms. Yi’s mother, Jung Kum-suk, screamed and collapsed as Russian medics rushed to her aid. Officials said later that she had recovered.

At about the same time, her daughter became the first Korean and the youngest woman ever to fly into space.

The launch triggered celebrations in South Korea, where thousands gathered near city hall in Seoul to watch on giant television screens. Live broadcasts showed Ms. Yi inside the capsule and waving and giving the thumbs-up sign.