It was not immediately clear why.
On Tuesday, an issue with the pressurizing system of the
rocket's oxidizer tank forced a last-minute cancellation of the
launch. It was delayed by 24 hours.
The two aborted launches are yet another setback in a project
that has been dogged by manufacturing delays and technical
issues.
President Vladimir Putin has grand ambitions for Russia's space
program, including planned construction of a new Russian space
station by 2027, and has described the Angara project as having
huge significance for national security.
The launch was set to be the first for this type of rocket at
Russia's new launch site at the Vostochny Cosmodrome, located in
the forests of the Amur region in Russia's Far East.
The 42.7-metre Angara launch vehicle is capable of carrying
payloads bigger than 20 tonnes into orbit.
Due to its location closer to the equator, Angara-A5 can deliver
a heavier payload to orbit if launched from Vostochny, Russia's
first and only post-Soviet spacecraft launch site, than from
Plesetsk, an Soviet-era facility where it has had three
successful test launches of the Angara rocket.
The setback follows the failure of a Russian moon mission last
August, its first in 47 years, when the spacecraft crashed into
the moon.
(Reporting by Reuters; Writing by Lucy Papachristou; editing by
Guy Faulconbridge)
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