Image (Credit): Galaxy NGC 6684 captured by the NASA/ESA Hubble Space Telescope. (ESA/Hubble & NASA, R. Tully)
This week’s image is from NASA/European Space Agency’s (ESA) Hubble Space Telescope. It shows the glowing galaxy NGC 6684, which is around 44 million light-years from Earth.
This oddly shaped galaxy is explained on the ESA’s website:
Lenticular galaxies like NGC 6684 (lenticular means lens-shaped) possess a large disc but lack the prominent spiral arms of galaxies like the Andromeda Galaxy. This leaves them somewhere between elliptical galaxies and spiral galaxies, and lends these galaxies a diffuse, ghostly experience. NGC 6684 also lacks the dark dust lanes that thread through other galaxies, adding to its spectral, insubstantial appearance.
The length of Mars’ day is shortening by three-quarters of a millisecond each year as the planet’s rotation spins up, according to new results from NASA’s InSight lander…Planetary scientists are not entirely sure why this is happening, but it is likely related to the redistribution of Mars’ mass, which can have an effect on the planet’s rotation like an ice skater pulling in their arms to spin faster. This redistribution might be caused by the accumulation of ice on Mars’ polar caps, experts believe, or by the surface itself slowly rebounding from residing under the weight of immense glaciers that existed at equatorial latitudes during the world’s most recent ice ages, which ended about 400,000 years ago.
NASA has left the door open for changing the scope of Artemis 3, currently set to be the first crewed lunar landing of the program, if key elements suffer major delays. Speaking at an Aug. 8 briefing at the Kennedy Space Center, Jim Free, NASA associate administrator for exploration systems development, said the Artemis 3 mission still has a formal launch date of December 2025 but that he was monitoring potential delays in hardware needed for the mission. “We may end up flying a different mission if that’s the case,” he said. “If we have these big slips out, we’ve looked at if can we do other missions.” Artemis 3 could also change based on the outcome of Artemis 2, he added.
One of the oldest known objects in the universe is wandering around the Milky Way. Star cluster M92, a densely packed ball of stars roughly 27,000 light-years from Earth, is about 13.8 billion years old, researchers report in a paper submitted June 3 to arXiv.org. The newly refined age estimate makes this clump of stars nearly the same age as the universe. Refining the ages of clusters like M92 can help put limits on the age of the universe itself. It can also help solve cosmic conundrums about how the universe evolved.
“While NASA’s programs are very popular and highly visible, we really don’t spend much on our space agency. In 2022, the U.S. treasury took in revenues of $4.9 trillion and then charged up another $1.4 trillion so it could spend a whopping $6.3 trillion. Of that largesse NASA received an historically generous appropriation of $24 billion. Still, that was just 0.35% of federal spending.”
Image (Credit): Artist’s rendering of Voyager 2. (NASA)
After two weeks with no word, Voyager 2 is back to communicating with us as it continues its journey beyond our solar system. The whole incident started when NASA sent a bad command, but all is well.
Voyager 2 first left Earth back in August 1977 and exited the solar system in December 2018. Like Voyager 1, which is also outside the solar system now, Voyager 2 had the initial task of studying the planets. Voyager 2 focused on Jupiter, Saturn, Uranus and Neptune. It has shown it was capable of much more as it dragged the human race to the bleeding edge of space.
You can read all about Voyager 2’s accomplishments at this NASA site, including:
Voyager 2 is the only spacecraft to study all four of the solar system’s giant planets at close range.
Voyager 2 discovered a 14th moon at Jupiter.
Voyager 2 was the first human-made object to fly past Uranus.
At Uranus, Voyager 2 discovered 10 new moons and two new rings.
Voyager 2 was the first human-made object to fly by Neptune.
At Neptune, Voyager 2 discovered five moons, four rings, and a “Great Dark Spot.”
An impressive list of accomplishments, and the spacecraft is still ticking as it goes into the great unknown.
We need to keep these achievements in mind as we battle over this year’s NASA budget. We also need to remember that there was supposed to be four Voyager-like spacecraft rather than two, but budget cuts nixed the second set. Meaning we can still get some great things done even if we don’t have the budget to fund every piece of a grand vision.
Image (Credit): Artist’s rendering of the Phoenix Mars Lander on the surface of Mars. (NASA/JPL-Calech/University of Arizona)
On this day in 2007, NASA launched the Phoenix Mars Lander from Cape Canaveral towards the Red Planet. The lander had two key objectives: (1) to study the history of water in the Martian arctic and (2) to search for evidence of a habitable zone and assess the biological potential of the ice-soil boundary.
The lander set down on Mars on May 25, 2008 and continued with its mission until November of that same year. The lander performed numerous tests on the Martian surface, confirmed the presence of water, and even discovered water ice right below where it landed. The lander also found perchlorate in the soil, which could be a source of oxygen for future missions.
The mission ended when the Martian winter diminished the sunlight needed to run the solar panels. The Phoenix Mars Lander did not survive the winter, but it successfully accomplished its mission.
Image (Credit): Phoenix Mars Lander mission patch. (NASA)
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