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June 14, 1949: The first mammal in space

14 June 2026 at 14:00

On June 14, 1949, a rhesus monkey named Albert II was launched into space aboard a V-2 rocket from White Sands, New Mexico. Prior to Albert II, animals including fruit flies, mice, and another monkey (Albert I) had been launched in rocket and balloon flights as part of American space biology research, but Albert IIโ€™sContinue reading "June 14, 1949: The first mammal in space"

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June 13, 1983: Pioneer 10 leaves solar system

13 June 2026 at 14:00

Pioneer 10 holds the titles for many โ€œfirstsโ€: It was NASAโ€™s first mission to the outer planets, the first spacecraft to fly beyond Mars, the first to traverse the asteroid belt, and the first to fly past Jupiter. It was also the first spacecraft placed on a trajectory to escape the solar system into interstellarContinue reading "June 13, 1983: Pioneer 10 leaves solar system"

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Do Distant Light Emissions Prove a Finite One-Way Speed of Light?

13 June 2026 at 06:04
Does the fact that we see light from very distant galaxies prove that the one-way speed of light is finite? Dr. Jason Lisle responds to this question. The conventionality thesis plays a critical role in understanding the issue, suggesting that measurements usually assume an isotropic light speed.

NASAโ€™sย X-59 Reaches Speed,ย Altitude for Future Quiet Supersonic Flights

12 June 2026 at 20:35
The X-59 in flight on June 12, 2026 against a blue sky.
NASAโ€™s X-59 quiet supersonic research aircraft reached its target speed and altitude for future community overflights for the first time during a flight on Friday, June 12, 2026. The milestone marked the first time the aircraft flew at Mach 1.4 and 55,000 feet โ€” conditions it will fly when gathering community response data to its quiet sonic thump.
NASA/Lori Losey

NASAโ€™s X-59ย experimentalย aircraftย reached a major milestoneย Friday, Juneย 12,ย flyingย Mach 1.4 (about 924 mph) and an altitude of 55,000 feet,ย theย conditions requiredย forย theย aircraftย to make future flights critical to its mission.ย ย 

Theย X-59ย still has months ofย performance testing ahead, but after those are complete, NASAโ€™s Quesst mission will fly the aircraft over several U.S. communities to collect dataย on publicย perceptionย of theย quiet sonic thumpย itย will make at supersonic speeds.ย Those community overflights willย include flightsย at Mach 1.4 and 55,000 feet.ย 

The milestone comes just days after the X-59โ€™s first supersonic flight.ย That flight showed theย aircraft performed as expected at Mach 1.1, butย Fridayโ€™sย missionย conditions flightย was anย even more critical step for NASA.ย 

Theย aircraftโ€™sย team has steadily expanded theย aircraftโ€™sย flight envelopeย byย evaluating its performanceย at aย variety of speedsย andย altitudes,ย and having its pilots take on aย battery ofย maneuvers.ย ย 

Photo of the XVS screen on the X-59 showing Mach 1.4 at 55,030 was achieved.
NASAโ€™s Xโ€‘59 eXternal Vision System (XVS) shows Mach 1.4 at 55,030 feet on Friday, June 12, 2026 during the aircraftโ€™s first mission conditions flight, the approximate conditions it will fly when gathering community response data to its quiet โ€œsonic thump.โ€ The milestone marks the first time the aircraft flew at its designed speed and altitude.
NASA/Lori Losey

The X-59 was designed to fly supersonic without causing a loud sonic boom.ย However, for these early supersonic flights it has been accompanied by a NASA F-15 researchย aircraft, a traditional supersonic jet that causes booms obscuring any noise the X-59 makes. During upcoming flights, a shock-sensing probe mounted to the F-15 will gatherย measurements of the X-59โ€™s shock wave signature, an early measure of its supersonic performance.ย 

After the team conducts more tests at a variety of altitudes and conditions to complete envelope expansion, the X-59 will enterย theย acoustic validation phaseย ofย Quesst.ย During this phase, researchers willย thoroughlyย measureย the aircraftโ€™s supersonicย acousticย signatureย โ€” the quiet thumpย itโ€™sย designed to make โ€”ย toย confirm itย is performing as intended.ย 

Each flightย bringsย NASAย one step closer to flyingย the X-59ย over communities and gathering feedback that could help shape the future of commercial supersonic flight over land.ย 

More X-59 to Explore

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Read more on the Quesst mission page.

The post NASAโ€™sย X-59 Reaches Speed,ย Altitude for Future Quiet Supersonic Flights appeared first on NASA Science.

June 11, 1986: Chesley Bonestell dies

11 June 2026 at 14:00

Born in 1888, artist and illustrator Chesley Bonestell became famous for his realistic paintings of space. His work spanned decades and many formats and publications; perhaps most influential was his collaboration with Wernher von Brain on the 1952โ€“54ย Collierโ€™sย series, โ€œMan Will Conquer Space Soon!โ€ By making the stuff of science fiction seem achievable, his artwork helpedContinue reading "June 11, 1986: Chesley Bonestell dies"

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Meet the astronauts flying on Artemis 3

9 June 2026 at 22:28

When NASA added a low Earth orbit test flight to the Artemis program in February, pushing the lunar landing from Artemis 3 to Artemis 4, it left the details sparse. On Tuesday, the agency filled them in. At a press conference, NASA named the four-person crew for Artemis 3, a 2027 Earth-orbit test flight thatContinue reading "Meet the astronauts flying on Artemis 3"

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