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NASA’s newest space observatory could sniff exoplanet atmospheres for signs of life

Artist rendition of what it might look like on the surface of Trappist-1f, a planet in the Trappist-1 system. Credit: NASA/JPL-Caltech

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Over the course of our existence, humanity has struggled to definitively answer the question: “Are we alone?”

Is Earth the only planet in the vast cosmic sea that contains life? As our technology becomes more advanced, we get closer and closer to the answer.

Our solar system contains a multitude of worlds, planetary bodies ranging from ice planets to gas giants with magnificent rings to rocky, terrestrial worlds like our own. But what lies out beyond our stellar neighborhood?

It’s only been in the last few decades that scientists have detected planets orbiting other stars. We call them exoplanets. Since that initial discovery, researchers have trained their telescopes on the cosmos in search of new and different worlds.

Their efforts were not in vain, as thousands of exoplanets have been detected. Now, scientists are starting to shift their focus to the individual planets and learning as much as they can about them. Do they contain life? What are they made of? What kind of atmosphere do they have?

These are the types of questions we hope to answer about the alien worlds that fill our universe.

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One element essential to life on Earth is oxygen. Its presence is what scientists refer to as a biosignature. (These are the types of things NASA’s next Mars rover will look for.) A recent paper published in Nature Astronomy details a new technique that scientists are hoping will help them detect the presence of oxygen in exoplanet atmospheres.

Like methane, oxygen is a biosignature but its presence does not guarantee we will find life. There are plenty of non-biological processes that produce oxygen (as well as methane). However, if other biosignatures are detected in addition to oxygen, the chances of life increase significantly.

NASA’s Curiosity rover detected a methane cycle on Mars that varies with the seasons. However, its orbital counterparts — European spacecraft TGO and Mars Express — have not. The science team is working to identify what is causing the methane spikes as well as why it seems to disappear as it rises through the atmosphere. 

Possible sources and sinks of methane on Mars. Credit: NASA

“Oxygen is one of the most exciting molecules to detect because of its link with life, but we don’t know if life is the only cause of oxygen in an atmosphere,” Edward Schwieterman, an astrobiologist at UC Riverside and co-author on the study, said in a statement. “This technique will allow us to find oxygen in planets both living and dead.”

The new method was developed by a team led by Thomas Fauchez, a planetary scientist at NASA’s Goddard Space Flight Center. It is derived from the behavior of oxygen molecules in Earth’s atmosphere.

When oxygen molecules collide, they produce a signala very subtle dip in infrared radiation. Unfortunately, that signal is so faint that current observatories cannot detect it in distant planets. But that will soon change. NASA’s latest and greatest telescope, the James Webb Space Telescope (JWST) will come online sometime in the next few years. Fauchez’s team has shown that JWST, which will observe the universe in the infrared, should have what it takes to spot it.

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“Before our work, oxygen at similar levels as on Earth was thought to be undetectable with Webb,” said Fauchez in a statement. “This oxygen signal is known since the early 1980s from Earth’s atmospheric studies but has never been studied for exoplanet research.”

In the meantime, NASA’s Mars 2020 rover will launch to the red planet in July. Once it’s on Mars, it will study Jezero Crater, the site of an ancient river delta and scan the region for signs of life (like oxygen, methane, and other biosignatures). The rover will also bag up bits of Mars to be returned to Earth at a later date.

I write about space, science, and future tech.

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NASA taps SpaceX for more astronaut missions as Boeing Starliner remains grounded

NASA just gave SpaceX a $946 million contract for three more astronaut missions through 2030.

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NASA has awarded SpaceX a $946 million contract modification covering three more astronaut missions to the International Space Station, according to an announcement the agency published Friday. The award adds Crew-15, Crew-16, and Crew-17 to SpaceX’s existing Commercial Crew Transportation Capability contract, bringing the agreement’s total value to $5.92 billion across 17 flights.

SpaceX confirmed the award on X, writing that it was excited for Falcon 9 and Dragon to launch NASA’s Crew-15, 16, and 17 missions to the Space Station from Florida. The new missions cover ground, launch, in orbit, and return operations, along with cargo transport and a lifeboat capability while docked at the station, and the period of performance runs through 2030.

The award follows a notice of intent NASA issued in May, when the agency first signaled it would purchase up to six additional post certification missions from SpaceX. Teslarati covered that filing at the time, noting NASA cited technical issues and schedule delays encountered by Boeing as a driving factor. Friday’s contract modification locks in three of those six missions, with the remaining three left open for NASA to award later, potentially to Boeing if Starliner clears certification.

Boeing’s CST-100 Starliner has still not flown an operational crew rotation mission for NASA. The spacecraft’s most recent crewed test flight in 2024 ended without the astronauts returning aboard Starliner, and the company has spent the time since working through thruster problems. SpaceX President Gwynne Shotwell said this week that SpaceX is not retiring Crew Dragon today, for sure, while stopping short of committing to fly it past 2030.

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Crew-12 is currently docked at the space station, and NASA has said Crew-13 is targeting a launch in the coming weeks. The newly awarded Crew-15 through Crew-17 missions extend SpaceX’s role as NASA’s primary way of getting astronauts to and from orbit well into the back half of the decade, regardless of what happens with Starliner or Starship in the meantime.

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SpaceX’s next Starship launch is about to attempt its biggest leap yet

SpaceX targets September 22 for Starship Flight 14, its first attempt to reach real orbit.

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SpaceX has set September 22 as the target date for Starship’s 14th test flight, and this one carries a different goal than any of the 13 that came before it. Every previous Starship mission has intentionally flown a suborbital arc, reentering the atmosphere within the same hour it launched. Flight 14 is designed to send the craft into a genuine orbit around Earth for the first time.

The launch window opens at 7:15 a.m. Central time at Starbase in South Texas and runs for 75 minutes, pending regulatory approval, according to SpaceX’s mission description published Tuesday. If the flight goes as planned, Starship will circle the planet roughly six times at an altitude near 275 kilometers over about ten hours before a deorbit burn sends it toward a splashdown in the Pacific Ocean west of Chile, a departure from the Indian Ocean recoveries used on the last several flights.

The mission also marks the first attempt to put a working batch of Starlink V3 satellites into actual service. Flight 13 carried 20 of the new satellites in July, but because that mission never left a suborbital trajectory, the payload reentered along with the ship instead of separating into orbit.

SpaceX tells the FCC that Starship Flight 14 is going to orbit

Each V3 satellite is rated for roughly one terabit per second of downlink capacity, so a successful deployment on Flight 14 would be SpaceX’s largest single jump in network bandwidth since Starlink began flying on Falcon 9.

Flight 13 still did the heavier lifting on the technical side. That July mission flew a deliberately more stressful reentry profile to test Starship’s heat shield, and the ship survived its softest splashdown yet, intact enough for drone inspections shortly after landing. Elon Musk said the flight delivered “all the heat shield data we needed and then some,” a result Teslarati covered in detail when he later said SpaceX had solved the vehicle’s biggest reusability challenge. Flight 14 is where SpaceX starts spending that confidence on an actual orbital insertion rather than another controlled fall back to Earth.

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One thing Flight 14 will not attempt is a tower catch of the ship. Musk floated the idea right after Flight 13, but walked the timeline back in August, saying a catch attempt was more likely “in a few months.” The Super Heavy booster will still aim for its own recovery, targeting an offshore landing point in the Gulf of America, the same approach used on recent flights.

September 22 is SpaceX’s own target, not a locked date. Starship’s schedule has slipped before over hardware readiness and FAA sign off, and the company has said as much in its own mission notes. But the plan itself represents the clearest marker yet that Starship is moving from a suborbital test program into something meant to carry paying payloads and, eventually, people.

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SpaceX tells the FCC that Starship Flight 14 is going to orbit

SpaceX filed with the FCC for Starship Flight 14, its first true orbital launch attempt.

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SpaceX has asked the Federal Communications Commission for permission to fly Starlink terminals during Starship’s fourteenth flight test, and the filing lays out a genuine trip to orbit, something the program has never attempted.

Every Starship flight so far, including Flight 13’s successful splashdown in the Indian Ocean on July 24, has flown a suborbital arc that ends with the ship reentering the atmosphere within the same hour it launches. The FCC paperwork describes a mission profile built around an actual orbital insertion instead.

The payload is the other half of the story. Flight 13 carried 20 production Starlink V3 satellites, but because that mission never reached orbit, the satellites reentered along with the ship rather than joining the constellation, something Teslarati covered in detail after SpaceX released footage shot from one of those satellites as it drifted away from Starship in space. Flight 14 is designed to close that gap. If the orbital insertion holds, the roughly 20 V3 satellites onboard would separate into an operational orbit and could eventually go into service, each one rated for about 1 terabit per second of downlink capacity by SpaceX’s own account.

SpaceX announces new Starbase for ‘thousands of Starship launches annually’

Elon Musk first flagged the orbital attempt during SpaceX’s August 4 earnings call, the company’s first as a public entity following its June IPO under the ticker SPCX. He also floated catching the ship with the Starbase tower on the same flight, an idea he walked back on August 20, saying the catch attempt would more likely come “in a few months,” as Teslarati reported at the time. Flight 14 will instead target a splashdown for the ship in the Indian Ocean, the same recovery method used since Flight 12.

Hardware has been catching up to the ambition. Booster 21 completed a full 33-engine static fire on August 28, and Ship 41 finished its own six-engine test the week before. An airspace briefing circulated to pilots on August 20 listed September 15 as the target date, later than the end of August window Musk mentioned on the earnings call, though SpaceX has not confirmed a launch date publicly and Starship schedules routinely slip while hardware and FAA paperwork line up.

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The FCC filing itself does not guarantee a launch date. It covers communications authority, and not flight readiness, considering SpaceX still needs Ship 41 fully stacked and cleared by the FAA before Flight 14 can fly. But the filing is a real marker of intent and it puts a specific regulatory process behind what had so far only been Musk’s word on the earnings call.

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