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ORLANDO, Fla. SpaceX has delayed Sunday's planned launch of it fifth
batch of Starlink satellites from Florida for technical reasons after an
earlier after postponement caused by weather concerns.
"Standing down from ... Starlink launch; the team is taking a closer
look at a second stage valve component," the company tweeted early
Saturday evening.
SpaceX, headed by Elon Musk, said it now hopes to launch its Falcon 9 rocket Monday.
The Falcon 9 rocket is loaded with 60 more Starlink spacecraft to lift
off from Launch Complex 40 at Cape Canaveral Air Force Station, Fla.,
about 60 miles east of Orlando. SpaceX has 242 of its large dinner
table-size satellites in orbit, each weighing over 500 pounds -- the
largest single satellite constellation in orbit.
The launch will come shortly after after SpaceX announced plans to spin
off Starlink as a separate publicly traded company, Bloomberg reported.
The space firm previously launched 60 Starlink satellites at a time in
May, November and on Jan. 6 and 29, with two test satellites launched
before that.
If all continues on track for the constellation, 100 or more such
Starlink launches could occur in the future. SpaceX intends ultimately
to launch thousands of satellites to beam broadband around the globe.
SpaceX is testing a satellite from an earlier launch that has a
non-reflective coating, to see if it is less visible to astronomers and
stargazers on the ground.
Starlink mission descriptions say satellites take months to reach their
proper orbit, so judging the effectiveness of the experiment will take a
while. In the meantime, SpaceX continues launching Starlink satellites.
The satellites orbit about 340 miles above the Earth. By comparison, the
Kármán line that defines space is 62 miles high, and the International
Space Station is more than 250 miles high.
The Starlink satellites detach from the rocket's second stage at an
altitude of about 180 miles. SpaceX engineers then conduct data reviews
to ensure all Starlink satellites are operating as intended. Once the
checkouts are complete, the satellites use onboard ion thrusters to move
into the final orbit height.
SpaceX has competitors who are planning their own new satellite
constellations, including OneWeb and Amazon. SpaceX says it is
leveraging its experience in building rockets and spacecraft to deploy
the world's most advanced broadband Internet system in Starlink. The
company stacks the satellites in the rocket nosecone, using a flat-panel
design that minimizes volume.
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