Two days ago, Russian President Vladimir Putin announced a change in the country's policy for employing nuclear weapons in conflict. Then, on Thursday, Russia attacked the Ukrainian city of Dnipro with a new type of ballistic missile capable of one day delivering multiple nuclear warheads to distant targets with little warning.

Putin says his ballistic missile attack on Ukraine is a warning to the West.

These events are just part of what has been a week of escalation in the war between Russia and Ukraine. In recent days, Ukraine fired US-made ATACMS tactical ballistic missiles and UK-supplied Storm Shadow missiles at targets in Russian territory for the first time. This followed approval by President Joe Biden for Ukraine to use US-provided longer-range missiles against Russian targets. Previously, Ukraine was only permitted to use them on its own territory.

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The Space Launch System rocket that will dispatch four astronauts on the first Moon mission in more than 50 years passed a major milestone Wednesday.

NASA said ground teams inside the Vehicle Assembly Building (VAB) at Kennedy Space Center in Florida lifted the aft assembly of the rocket's left booster onto the mobile launch platform. Using an overhead crane, teams hoisted the left aft booster assembly—already filled with pre-packed solid propellant—from the VAB transfer aisle, over a catwalk dozens of stories high and then down onto mounting posts on the mobile launcher.

This marks the start of stacking for the second SLS rocket earmarked to launch NASA's Artemis II mission and slated to send NASA astronauts Reid Wiseman, Victor Glover, Christina Koch, and Canadian astronaut Jeremy Hansen on a 10-day flight around the far side of the Moon. Artemis II will be the first crewed flight of NASA's Artemis program and the first time people fly on the SLS rocket and Orion spacecraft.

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SpaceX launched its sixth Starship rocket Tuesday, proving for the first time that the stainless steel ship can maneuver in space and paving the way for an even larger, upgraded vehicle slated to debut on the next test flight.

The only hiccup was an abortive attempt to catch the rocket's Super Heavy booster back at the launch site in South Texas, something SpaceX achieved on the previous flight on October 13. The Starship upper stage flew halfway around the world, reaching an altitude of 118 miles (190 kilometers) before plunging through the atmosphere for a pinpoint slow-speed splashdown in the Indian Ocean.

The sixth flight of the world's largest launcher—standing 398 feet (121.3 meters) tall—began with a lumbering liftoff from SpaceX's Starbase facility near the US-Mexico border at 4 pm CST (22:00 UTC) Tuesday. The rocket headed east over the Gulf of Mexico, propelled by 33 Raptor engines clustered on the bottom of its Super Heavy first stage.

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The sixth flight of SpaceX's giant Starship rocket, set for takeoff on Tuesday from South Texas, will test the vehicle's limits in new ways.

Most importantly, SpaceX will attempt to briefly reignite one of Starship's six Raptor engines in space. SpaceX tried this on Starship's third launch in March but aborted the engine restart after the rocket lost roll control during the flight's coast phase.

A successful engine relight demonstration would pave the way for future Starships to ascend into stable, sustainable orbits. It's essential to test the Raptor engine's ability to reignite in space for a deorbit burn to steer Starship out of orbit toward an atmospheric reentry.

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Officials from NASA and Russia’s space agency don’t see eye to eye on the causes and risks of small but persistent air leaks on the International Space Station.

That was the word from the new chair of NASA's International Space Station Advisory Committee last week. The air leaks are located in the transfer tunnel of the space station's Russian Zvezda service module, one of the oldest elements of the complex.

US and Russian officials "don't have a common understanding of what the likely root cause is, or the severity of the consequences of these leaks," said Bob Cabana, a retired NASA astronaut who took the helm of the advisory committee earlier this year. Cabana replaced former Apollo astronaut Tom Stafford, who chaired the committee before he died in March.

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SpaceX's Starlink Internet satellites are responsible for more and more public reports of unexplained anomalous phenomena (UAPs), but most recent cases remain unsolved, according to a US government report released Thursday.

Starlinks often move across the sky in "trains" that appear like gleaming gems in the blackness of space. They are particularly visible to the naked eye shortly after each Starlink launch.

In recent years, leaks and disclosures from government officials have revitalized open discussion about mysterious lights and objects, some of which move in, to put it bluntly, unquestionably weird ways. Some of these images, particularly those from sophisticated instruments on military fighter jets, have made their way into the national discourse. The New Yorker, Ars' sister publication, has a thorough report on how UAPs—you might know them better as UFOs—became mainstream.

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Firefly Aerospace, a Texas-based company resurrected from bankruptcy, is riding high these days. In a few months, Firefly will attempt to become the second company to safely place a commercial lander on the Moon. Firefly's Alpha rocket has reached orbit four times, and engineers are developing a larger medium-class rocket in partnership with Northrop Grumman, one of the largest US aerospace and defense contractors.

There's also an orbital transfer vehicle, named Elytra, in Firefly's diversified portfolio. This diversification is proving attractive to investors. Firefly announced Tuesday that it completed a $175 million Series D fundraising round, resulting in a valuation of more than $2 billion. This follows a banner year of fundraising in 2023, when Firefly reported investors funneled approximately $300 million into the company at a valuation of $1.5 billion.

"Firefly is extremely grateful for our existing and new investors whose support demonstrates a huge vote of confidence in our capabilities and future," said Jason Kim, who took over as the company's CEO in October. He replaced Bill Weber, who resigned as chief executive after reports of an alleged inappropriate relationship with a female employee.

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The astronauts who came home from the International Space Station last month experienced some drama on the high frontier, and some of it accompanied them back to Earth.

In orbit, the astronauts aborted two spacewalks, both under unusual circumstances. Then, on October 25, one of the astronauts was hospitalized due to what NASA called an unspecified "medical issue" after splashdown aboard a SpaceX Crew Dragon capsule that concluded the 235-day mission. After an overnight stay in a hospital in Florida, NASA said the astronaut was released "in good health" and returned to their home base in Houston to resume normal post-flight activities.

The space agency did not identify the astronaut or any details about their condition, citing medical privacy concerns. The three NASA astronauts on the Dragon spacecraft included commander Matthew Dominick, pilot Michael Barratt, and mission specialist Jeanette Epps. Russian cosmonaut Alexander Grebenkin accompanied the three NASA crew members. Russia's space agency confirmed he was not hospitalized after returning to Earth.

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Welcome to Edition 7.19 of the Rocket Report! Okay, we get it. We received more submissions from our readers on Australia's approval of a launch permit for Gilmour Space than we've received on any other news story in recent memory. Thank you for your submissions as global rocket activity continues apace. We'll cover Gilmour in more detail as they get closer to launch. There will be no Rocket Report next week as Eric and I join the rest of the Ars team for our 2024 Technicon in New York.

As always, we welcome reader submissions. If you don't want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets as well as a quick look ahead at the next three launches on the calendar.

Gilmour Space has a permit to fly. Gilmour Space Technologies has been granted a permit to launch its 82-foot-tall (25-meter) orbital rocket from a spaceport in Queensland, Australia. The space company, founded in 2012, had initially planned to lift off in March but was unable to do so without approval from the Australian Space Agency, the Australian Broadcasting Corporation reports. The government approved Gilmour's launch permit Monday, although the company is still weeks away from flying its three-stage Eris rocket.

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From its halo-like orbit nearly a million miles from Earth, the James Webb Space Telescope is seeing farther than human eyes have ever seen.

In May, astronomers announced that Webb detected the most distant galaxy found so far, a fuzzy blob of red light that we see as it existed just 290 million years after the Big Bang. Light from this galaxy, several hundreds of millions of times the mass of the Sun, traveled more than 13 billion years until photons fell onto Webb's gold-coated mirror.

A few months later, in July, scientists released an image Webb captured of a planet circling a star slightly cooler than the Sun nearly 12 light-years from Earth. The alien world is several times the mass of Jupiter and the closest exoplanet to ever be directly imaged. One of Webb's science instruments has a coronagraph to blot out bright starlight, allowing the telescope to resolve the faint signature of a nearby planet and use spectroscopy to measure its chemical composition.

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The director of the National Reconnaissance Office has a message for US adversaries around the world.

"You can’t hide, because we’re constantly looking," said Chris Scolese, a longtime NASA engineer who took the helm of the US government's spy satellite agency in 2019.

The NRO is taking advantage of SpaceX's Starlink satellite assembly line to build a network of at least 100 satellites, and perhaps many more, to monitor adversaries around the world. So far, more than 80 of these SpaceX-made spacecraft, each a little less than a ton in mass, have launched on four Falcon 9 rockets. There are more to come.

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Earlier this week, North Korea apparently completed a successful test of its most powerful intercontinental ballistic missile, lofting it nearly 4,800 miles into space before the projectile fell back to Earth.

This solid-fueled, multi-stage missile, named the Hwasong-19, is a new tool in North Korea's increasingly sophisticated arsenal of weapons. It has enough range—perhaps as much as 9,320 miles (15,000 kilometers), according to Japan's government—to strike targets anywhere in the United States.

The test flight of the Hwasong-19 on Thursday was North Korea's first test of a long-range missile in nearly a year, coming as North Korea deploys some 10,000 troops inside Russia just days before the US presidential election. US officials condemned the missile launch as a "provocative and destabilizing" action in violation of UN Security Council resolutions.

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The European Commission announced Thursday it plans to sign a contract with the continent's leading space companies before the end of the year to begin development of a 290-satellite broadband Internet network estimated to cost more than 10 billion euros (about $10.9 billion).

The press release announcing the contract award to IRIS²—known as Infrastructure for Resilience, Interconnectivity and Security by Satellite—did not specify the financial details of the agreement, but European media has widely reported the 10 billion euro cost. The commission's decision follows an evaluation of the best-and-final offer from the SpaceRISE consortium formed by European satellite network operators SES, Eutelsat, and Hispasat.

We’ll do it ourselves

The European Commission, the European Union's executive arm, is managing the IRIS² program, which will also receive funding from the European Space Agency and European industry in a public-private partnership. European governments previously expected to provide around 60 percent of the funding for the initiative. Under that plan, European industry would supply roughly 40 percent of the money in a public-private partnership. The specifics of the final cost-sharing arrangement were not available Thursday.

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A little more than a year ago, a snippet of video that wasn't supposed to go public made its way onto United Launch Alliance's live broadcast of an Atlas V rocket launch carrying three classified surveillance satellites for the US Space Force and the National Reconnaissance Office.

On these types of secretive national security missions, the government typically requests that the launch provider stop providing updates on the ascent into space when the rocket jettisons its two-piece payload fairing a few minutes after launch. And there should be no live video from the rocket released to the public showing the fairing separation sequence, which exposes the payloads to the space environment for the first time.

But the public saw video of the clamshell-like payload fairing falling away from the Atlas V rocket as it fired downrange from Cape Canaveral, Florida, on September 10, 2023. It wasn't pretty. Numerous chunks of material, possibly insulation from the inner wall of the payload shroud's two shells, fell off the fairing. The video embedded below shows the moment of payload fairing jettison.

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For those who follow NASA's human spaceflight program, when the Orion spacecraft's heat shield cracked and chipped away during atmospheric reentry on the unpiloted Artemis I test flight in late 2022, what caused it became a burning question.

Multiple NASA officials said Monday they now know the answer, but they're not telling. Instead, agency officials want to wait until more reviews are done to determine what this means for Artemis II, the Orion spacecraft's first crew mission around the Moon, officially scheduled for launch in September 2025.

"We have gotten to a root cause," said Lakiesha Hawkins, assistant deputy associate administrator for NASA's Moon to Mars program office, in response to a question from Ars on Monday at the Wernher von Braun Space Exploration Symposium in Huntsville, Alabama.

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NASA said Saturday that an astronaut who was hospitalized after returning from space the day before has been released and is in "good health." The agency did not provide any more details on the matter, citing medical privacy protections.

The astronaut was one of four crew members who returned from a 235-day mission in low-Earth orbit with a predawn splashdown Friday. The four-person crew splashed down inside SpaceX's Crew Dragon Endeavour spacecraft at 3:29 am EDT (07:29 UTC) in the Gulf of Mexico south of Pensacola, Florida.

Commander Matthew Dominick, pilot Michael Barratt, mission specialist Jeanette Epps, and Russian cosmonaut Alexander Grebenkin were inside SpaceX's Dragon spacecraft for reentry and splashdown. NASA said one of its astronauts "experienced a medical issue" after the splashdown, and all four crew members were flown to Ascension Sacred Heart Pensacola for medical evaluation.

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Welcome to Edition 7.17 of the Rocket Report! Next week marks 10 years since one of the more spectacular launch failures of this century. On October 28, 2014, an Antares rocket, then operated by Orbital Sciences, suffered an engine failure six seconds after liftoff from Virginia and crashed back onto the pad in a fiery twilight explosion. I was there and won't forget seeing the rocket falter just above the pad, being shaken by the deafening blast, and then running for cover. The Antares rocket is often an afterthought in the space industry, but it has an interesting backstory touching on international geopolitics, space history, and novel engineering. Now, Northrop Grumman and Firefly Aerospace are developing a new version of Antares.

As always, we welcome reader submissions. If you don't want to miss an issue, please subscribe using the box below (the form will not appear on AMP-enabled versions of the site). Each report will include information on small-, medium-, and heavy-lift rockets as well as a quick look ahead at the next three launches on the calendar.

Astra gets a lifeline from DOD. Astra, the launch startup that was taken private again earlier this year for a sliver of its former value, has landed a new contract with the Defense Innovation Unit (DIU) to support the development of a next-gen launch system for time-sensitive space missions, TechCrunch reports. The contract, which the DIU awarded under its Novel Responsive Space Delivery (NRSD) program, has a maximum value of $44 million. The money will go toward the continued development of Astra’s Launch System 2, designed to perform rapid, ultra-low-cost launches.

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Sometimes, it's worth noting when something goes unsaid.

On Wednesday, Boeing's new CEO, Kelly Ortberg, participated in his first quarterly conference call with investment analysts. Under fire from labor groups and regulators, Boeing logged a nearly $6.2 billion loss for the last three months, while the new boss pledged a turnaround for the troubled aerospace company.

What Ortberg didn't mention in the call was the Starliner program. Starliner is a relatively small portion of Boeing's overall business, but it's a high-profile and unprofitable one.

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United Launch Alliance has started assembling its next Vulcan rocket—the first destined to launch a US military payload—as the Space Force prepares to certify it to loft the Pentagon's most precious national security satellites.

Space Force officials expect to approve ULA's Vulcan rocket for military missions without requiring another test flight, despite an unusual problem on the rocket's second demonstration flight earlier this month.

ULA has launched two Vulcan test flights. Military officials watched closely, gathering data to formally certify the rocket is reliable enough to launch national security missions. The first test flight in January, designated Cert-1, was nearly flawless. The Cert-2 launch October 4 overcame an anomaly on one of Vulcan's strap-on solid rocket boosters, which lost its exhaust nozzle but kept firing with degraded thrust.

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