Pic of the Week: Spiral Galaxy NGC 3137

Posted on by onespaceman2000
Image (Credit): Hubble Space Telescope image of NGC 3137, located 53 million light-years away. (ESA/Hubble & NASA, D. Thilker and the PHANGS-HST Team

This week’s image is from the Hubble Space Telescope. It shows spiral galaxy NGC 3137 in all its glory. We are getting a nice inclined view of the galaxy, allowing us to see multiple arms of stars.

The European Space Agency (ESA) describes what we are seeing in this way:

A spiral galaxy seen close up and tilted at an angle, so that its disc fills the view from corner to corner. Its disc is yellow near to the centre and pale blue farther out, showing cooler and hotter stars, respectively. Thin brown clouds of dust, glowing pink spots of star formation, and sparkling blue patches filled with star clusters swirl through the galaxy. Behind it, small orange dots are very distant galaxies.

A Day in Astronomy: Launch of the Galex Space Telescope

Posted on by onespaceman2000
Image (Credit): Artist’s rendering of the GALEX space telescope orbiting Earth. (NASA/JPL-Caltech)

On this day in 2003, NASA air-launched the Galaxy Evolution Explorer (GALEX) via a Pegasus launch vehicle. It was an active orbiting space telescope for the next nine years, observing the universe in ultraviolet wavelengths to learn more about star formation in the universe.

Some of the highlights of the GALEX mission include:

  • Discovering a gargantuan, comet-like tail behind a speeding star called Mira;
  • Catching a black hole “red-handed” as it munched on a star;
  • Finding giant rings of new stars around old, dead galaxies;
  • Independently confirming the nature of dark energy; and
  • Discovering a missing link in galaxy evolution — the teenage galaxies transitioning from young to old.

Audit Report: Will the Artemis Astronauts Have Spacesuits?

Posted on by onespaceman2000
Credit: NASA OIG

A new audit report from NASA’s Office of Inspector General (OIG) expressed some concerns about whether the contractor, Axiom Space, will have spacesuits ready in time for the planned lunar landing.

The audit report, NASA’s Acquisition of Next-Generation Spacesuit Services, states:

NASA faces challenges in ensuring next-generation spacesuits are available to meet the Agency’s current schedules for the Artemis lunar landing mission in 2028 and prior to the ISS’s decommissioning in 2030. NASA’s original schedules to demonstrate the lunar and microgravity spacesuits in 2025 and 2026, respectively, were overly optimistic and ultimately proved unachievable, as evidenced by delays of at least a year and a half for both spacesuits. Based on our analysis, if Axiom experiences design and testing delays in line with the historical average for recent space programs, the Artemis and ISS demonstrations may not occur until 2031.

That is a damning conclusion at a time NASA is struggling with other Artemis timetables. All of the pieces need to come together soon, including the necessary equipment for the lunar surface. It also does not help that NASA is completely reliant on one contractor for these spacesuits. Even the lunar lander has two competing contractors.

NASA Administrator Isaacman has one more item now keeping him awake at night.

Pic of the Week: Hubble and the Crab Nebula

Posted on by onespaceman2000
Image (Credit): A 2024 image of the Crab Nebula captured by NASA’s Hubble Space Telescope. (NASA, ESA, STScI, William Blair (JHU); Image Processing: Joseph DePasquale (STScI))

This week’s image is from the Hubble Space Telescope. It is an image of the Crab Nebula taken 25 years after the Hubble’s first image of the nebula. If you want to learn more about this history, a paper titled The Crab Nebula Revisited Using HST/WFC3 can be found in The Astrophysical Journal.

Here is a little more from NASA on earlier sightings of the nebula:

This new Hubble observation continues a legacy that stretches back nearly 1,000 years, when astronomers in 1054 recorded the supernova as an impressively bright new star that, for weeks, was visible even during the day. The Crab Nebula is the aftermath of SN 1054, located 6,500 light-years from Earth in the constellation Taurus…

The supernova remnant was discovered in the mid-18th century, and in the 1950s Edwin Hubble was among several astronomers who noted the close correlation between Chinese astronomical records of a supernova and the position of the Crab Nebula. The discovery that the heart of the Crab contained a pulsar — a rapidly rotating neutron star — that was powering the nebula’s expansion finally aligned modern observations and ancient records.