Science
China spacecraft sends Mars footage for first time – Al Jazeera English
China’s space agency releases video footage two days after its Mars probe successfully entered the red planet’s orbit.
China’s space agency has released video footage from its spacecraft circling Mars, two days after it successfully entered the planet’s orbit in Beijing’s latest ambitious space mission.
In the video, published by state broadcaster CCTV, the surface of the planet is seen coming into view out of a pitch-black sky against the outside of the Tianwen-1, which entered the orbit of the Red Planet on Wednesday.
White craters are visible on the planet’s surface, which fades from white to black through the video as the probe flies over the course of one Martian day, said official news agency Xinhua.
The 5,000-kilogramme (five-tonne) Tianwen-1 – which translates to “Questions to Heaven” – includes a Mars orbiter, a lander and a solar-powered rover and launched from southern China last July.
It is the latest step in Beijing’s space programme, which aims to establish a crewed space station by 2022 and eventually put an astronaut on the moon, and has opened up a new, extraterrestrial arena for US-China competition.
Signs of past life
Tianwen-1 launched around the same time as a rival US mission and is expected to touch down on the surface of the planet in May.
Its success comes the same week as the United Arab Emirates’s Hope probe also successfully entered Mars’s orbit – making history as the Arab world’s first interplanetary mission.
Chinese scientists hope to land a 240-kilogramme (529-pound) rover in May in Utopia, an enormous impact basin on Mars. Its orbiter will last for a Martian year.
For the three-month study of the planet’s soil and atmosphere, the mission will take photos, chart maps and look for signs of past life.
The probe has already sent back its first image of Mars – a black-and-white photo that showed geological features including the Schiaparelli crater and the Valles Marineris, a vast stretch of canyons on the Martian surface.
Mars has proved to be a challenging target, with most missions since 1960, sent by Russia, Europe, Japan and India, ending in failure.
NASA’s Perseverance, which is set to touch down on the Red Planet on February 18, will become the fifth rover to complete the voyage since 1997 – and all so far have been American.
Science
SpaceX sends 23 Starlink satellites into low-Earth orbit
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April 23 (UPI) — SpaceX launched 23 Starlink satellites into low-Earth orbit Tuesday evening from Space Launch Complex 40 at Cape Canaveral Space Force Station in Florida.
Liftoff occurred at 6:17 EDT with a SpaceX Falcon 9 rocket sending the payload of 23 Starlink satellites into orbit.
The Falcon 9 rocket’s first-stage booster landed on an autonomous drone ship in the Atlantic Ocean after separating from the rocket’s second stage and its payload.
The entire mission was scheduled to take about an hour and 5 minutes to complete from launch to satellite deployment.
The mission was the ninth flight for the first-stage booster that previously completed five Starlink satellite-deployment missions and three other missions.
Science
NASA Celebrates As 1977’s Voyager 1 Phones Home At Last
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Voyager 1 has finally returned usable data to NASA from outside the solar system after five months offline.
Launched in 1977 and now in its 46th year, the probe has been suffering from communication issues since November 14. The same thing also happened in 2022. However, this week, NASA said that engineers were finally able to get usable data about the health and status of its onboard engineering systems.
Slow Work
Fixing Voyager 1 has been slow work. It’s currently over 15 billion miles (24 billion kilometers) from Earth, which means a radio message takes about 22.5 hours to reach it—and the same again to receive an answer.
The problem appears to have been its flight data subsystem, one of one of the spacecraft’s three onboard computers. Its job is to package the science and engineering data before it’s sent to Earth. Since the computer chip that stores its memory and some of its code is broken, engineers had to re-insert that code into a new location.
Next up for engineers at NASA’s Jet Propulsion Laboratory in California is to adjust other parts of the FDS software so Voyager 1 can return to sending science data.
Beyond The ‘Heliopause’
The longest-running and most distant spacecraft in history, Voyager 1, was launched on September 5, 1977, while its twin spacecraft, Voyager 2, was launched a little earlier on August 20, 1977. Voyager 2—now 12 billion miles away and traveling more slowly—continues to operate normally.
Both are now beyond what astronomers call the heliopause—a protective bubble of particles and magnetic fields created by the sun, which is thought to represent the sun’s farthest influence. Voyager 1 got to the heliopause in 2012 and Voyager 2 in 2018.
Pale Blue Dot
Since their launch from Cape Canaveral, Florida, aboard Titan-Centaur rockets, Voyager 1 and Voyager 2 have had glittering careers. Both photographed Jupiter and Saturn in 1979 and 1980 before going their separate ways. Voyager 1 could have visited Pluto, but that was sacrificed so scientists could get images of Saturn’s moon, Titan, a maneuver that made it impossible for it to reach any other body in the solar system. Meanwhile, Voyager 2 took slingshots around the planets to also image Uranus in 1986 and Neptune in 1989—the only spacecraft ever to image the two outer planets.
On February 14, 1990, when 3.7 billion miles from Earth, Voyager 1 turned its cameras back towards the sun and took an image that included our planet as “a mote of dust suspended in a sunbeam.” Known as the “Pale Blue Dot,” it’s one of the most famous photos ever taken. It was remastered in 2019.
Science
NASA hears from Voyager 1, the most distant spacecraft from Earth, after months of quiet
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CAPE CANAVERAL, Fla. (AP) – NASA has finally heard back from Voyager 1 again in a way that makes sense.
The most distant spacecraft from Earth stopped sending back understandable data last November. Flight controllers traced the blank communication to a bad computer chip and rearranged the spacecraft’s coding to work around the trouble.
NASA’s Jet Propulsion Laboratory in Southern California declared success after receiving good engineering updates late last week. The team is still working to restore transmission of the science data.
It takes 22 1/2 hours to send a signal to Voyager 1, more than 15 billion miles (24 billion kilometers) away in interstellar space. The signal travel time is double that for a round trip.
Contact was never lost, rather it was like making a phone call where you can’t hear the person on the other end, a JPL spokeswoman said Tuesday.
Launched in 1977 to study Jupiter and Saturn, Voyager 1 has been exploring interstellar space – the space between star systems – since 2012. Its twin, Voyager 2, is 12.6 billion miles (20 billion kilometers) away and still working fine.
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