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tonyPick writes:

Covered at Sen is the news that a software glitch is causing problems for the Light Sail project launched by the Planetary Society

The privately funded Planetary Society, a California-based space exploration advocacy group, has not been in communication with its LightSail since Friday, two days after it hitched a ride to orbit aboard an Atlas 5 rocket carrying the U.S. Air Force’s X-37B robotic mini shuttle.

This is also covered at the Planetary Society blog:

It is now believed that a vulnerability in the software controlling the main avionics board halted spacecraft operations, leaving a reboot as the only remedy to continue the mission. When that occurs, the team will likely initiate a manual sail deployment as soon as possible.
...
The manufacturer of the avionics board corrected this glitch in later software revisions. But alas, LightSail’s software version doesn’t include the update.

The team are hoping for a reboot to bring the device back to life, either from a ground transmission or charged particle glitch, although attempts to reboot from the ground look to have failed to date.

Cal Poly is automating the reboot command transmission to be sent every few ground station passes, on the hope that one command sneaks through (we don't send the command on every pass because a successful reboot triggers a waiting period before beacon transmissions begin). But as of right now, we can’t do much except wait, hoping a charged particle smacks the spacecraft in just the right way to cause a reboot. LightSail is capable of remaining in orbit about six months in its CubeSat form.

Additional background on the project is available in a previous SN article, and ongoing updates at the mission control page for the LightSail project.

ticho writes:

We've previously covered the Lightsail projects tribulations... Now there is better news.

Washington Post reports:

Since launching on May 20, the Planetary Society's solar sail prototype -- called LightSail and inspired by an idea Carl Sagan championed decades ago -- hasn't exactly had smooth seas.

A glitch made the tiny satellite holding the folded sail unreachable from Earth for a time. Even after communications were re-established, it took days to get the spacecraft to do the one thing it was sent up to do -- deploy its sail, proving that a propulsion system thinner than human hair could be packed away and unfurled safely in space.

On June 7, the Planetary Society reports, the sail finally unfurled.

Original announcement straight from Planetary Society can be found here.

takyon writes:

LightSail 2 Sends Back 1st Signals from Its Solar-Surfing Test Flight

The space advocacy organization The Planetary Society recently confirmed that its LightSail 2 spacecraft has sent its first signals home from space.

The roughly 11-lb. (5 kilograms) cubesat is designed to prove that solar sailing is a feasible way of keeping satellites moving. Fuel is a costly and heavy commodity, and if LightSail 2 can prove that the solar-powered technique works well, perhaps future missions into the deep reaches of the solar system and beyond can be propelled by the charged particles released by the sun.

The project launched into space last week (June 25) from the Kennedy Space Center in Florida aboard a SpaceX Falcon Heavy megarocket. On Tuesday (July 2), the bread-loaf-size LightSail 2 experiment left Prox-1, its carrier vehicle. LightSail 2 will ultimately open up its ultrathin four-panel sail to achieve a surface area about the size of a boxing ring.

[...] Once the cubesat deploys its solar sail early next week, the rays from the sun will give LightSail 2 a gentle push. The goal is to observe LightSail 2 over the course of a month to see if it shifts in its orbit by a measurable amount, according to The Planetary Society officials. That will help demonstrate that solar sailing is an effective satellite-propulsion technique.

In other news, 'Oumuamua is not an alien light sail, probably.

See also: What's the Difference between LightSail 1 and LightSail 2?
First Contact! LightSail 2 Phones Home to Mission Control
See the Latest Data from LightSail 2 on Our New Mission Control Dashboard (here)

Previously: Planetary Society's "LightSail" Solar Sail Test Launch on May 20
Lightsail Update: Back in Communication
Planetary Society's LightSail Has Finally Deployed After Multiple Setbacks
One Legacy of Carl Sagan May Take Flight Next Week—a Working Solar Sail
Falcon Heavy to Launch STP-2; 4-Hour Window Opens @ 2019-06-25 2:30am EDT (2019-06-25 0630 UTC)

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