Jump to content

White Dwarf Lost in Planetary Nebula


HubbleSite

Recommended Posts

low_STSCI-H-p0821a-k-1340x520.png

Call it the case of the missing dwarf. A team of stellar astronomers is engaged in an interstellar CSI (crime scene investigation). They have two suspects, traces of assault and battery, but no corpse. The southern planetary nebula SuWt 2 is the scene of the crime, some 6,500 light-years from Earth in the direction of the constellation Centaurus. SuWt 2 consists of a bright, nearly edge-on glowing ring of gas. Faint lobes extend perpendicularly to the ring, giving the faintest parts of the nebula an hourglass shape. These glowing ejecta are suspected to have been energized by a star that has now burned out and collapsed to a white dwarf. But the white dwarf is nowhere to be found. This color image was taken on Jan. 31, 1995 at the Cerro Tololo Inter-American Observatory in Chile. These results are being presented today at the 212th meeting of the American Astronomical Society in St. Louis, Mo.

View the full article

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Topics

    • By USH
      While observing the Orion Nebula with his 12-inch Dobsonian telescope, a sky-watcher noticed an unusual flashing object. As stars appeared to drift due to Earth's rotation, this particular object while flashing approximately every 20 seconds clearly travels through deep space. 

      The observer wonders whether it might be a rotating satellite or not. However, this isn’t the first sighting of cigar-shaped UFOs or other mysterious objects traveling through space near the Orion Nebula, so it is quite possible that it could be an interstellar craft. 
      Over the years, I have shared several articles, complete with images and videos, documenting similar UFO sightings around the Orion Nebula. You can explore these under the tag: Orion Nebula. 
      Interestingly, these sightings have all occurred between November and February, suggesting there may be a seasonal pattern to these observations.
        View the full article
    • By NASA
      NASA/JPL-Caltech This 2013 image taken by NASA’s Wide-Field Infrared Survey Explorer, or WISE, captures a nebula that looks like a witch screaming. Perhaps that imagined scream is a creation spell, for the Witch Hat nebula’s billowy clouds are a star nursery. We can see these clouds thanks to massive stars lighting them up; dust in the cloud is being hit with starlight, causing it to glow with infrared light, which was picked up by WISE’s detectors.
      WISE launched to near-Earth orbit on Dec. 14, 2009, and surveyed the full sky in four infrared wavelength bands until the frozen hydrogen cooling the telescope was depleted in September 2010. The spacecraft was placed into hibernation in February 2011, having completed its primary astrophysics mission.
      In late 2013, the spacecraft was resurrected – no incantation needed – when NASA’s Planetary Science Division gave it a new mission and a new name: NEOWISE. The spacecraft began helping NASA identify and describe near-Earth objects (NEOs). NEOs are comets and asteroids that have been nudged into orbits that allow them to enter Earth’s neighborhood. NEOWISE was decommissioned Aug. 8, 2024, and placed into hibernation for the last time, ending its career as an active asteroid hunter.
      Image credit: NASA/JPL-Caltech
      View the full article
    • By NASA
      Learn Home Culturally Inclusive Planetary… Biological & Physical… Overview Learning Resources Science Activation Teams SME Map Opportunities More Science Activation Stories Citizen Science   2 min read
      Culturally Inclusive Planetary Engagement in Colorado
      In August 2024, the NASA Science Activation program’s Planetary Resources and Content Heroes (ReaCH) project held a Culturally Inclusive Planetary Engagement workshop at the Laboratory for Atmospheric and Space Physics in Boulder, Colorado for the planetary science community. These workshops are designed to enhance the ability of scientists to engage Black and Latinx youth and their families in planetary science. Workshops include discussions with local educators about evidence-based engagement strategies and experiences conducting hands-on planetary science activities, along with an opportunity to practice these approaches during an event with local partners.
      Planetary scientists and engineers from Boulder, as well as scientists from Florida, Maryland, and Alaska participated. ReaCH partnered with the Boys & Girls Clubs of Metro Denver, whose staff participated in the workshop to share their perspectives. Other educators local to the Denver area also participated, along with an educational specialist from NASA@ My Library (another Science Activation program). The workshop culminated in an event at the Shopneck Boys & Girls Club in Brighton, CO; workshop participants facilitated a variety of hands-on planetary activities for approximately 120 children. Workshop participants also shared information about college pathways into science professions with teenagers at the Club.
      During feedback with evaluators, workshop participants shared, “I got to have hands-on experience working with an underserved population, which I haven’t done before in a workshop. I think this is the necessary next step for me. I am tired of just learning about things. I want to DO things. This gave me the ability to do it without setting up everything myself.”
      Through careful revisions to these workshops and detailed evaluation, the Planetary ReaCH project is building a replicable model that will be used to support similar workshops for other science fields. Members of the planetary and astrobiology community are invited to apply to attend future ReaCH workshops.
      Planetary ReaCH is supported by NASA under cooperative agreement award number 80NSSC21M0003 and is part of NASA’s Science Activation Portfolio. Learn more about how Science Activation connects NASA science experts, real content, and experiences with community leaders to do science in ways that activate minds and promote deeper understanding of our world and beyond: https://science.nasa.gov/learn
      Workshop participants experimented with activities such as this model of impact cratering. Share








      Details
      Last Updated Oct 03, 2024 Editor NASA Science Editorial Team Related Terms
      Biological & Physical Sciences Opportunities For Educators to Get Involved Opportunities For Students to Get Involved Planetary Science Science Activation Explore More
      2 min read New NASA eClips VALUE Bundles for Learners with Varied Needs


      Article


      1 day ago
      3 min read 2024 ASGSR Art Competition! 


      Article


      1 day ago
      7 min read NASA’s Webb Reveals Unusual Jets of Volatile Gas from Icy Centaur 29P


      Article


      1 day ago
      Keep Exploring Discover More Topics From NASA
      James Webb Space Telescope


      Webb is the premier observatory of the next decade, serving thousands of astronomers worldwide. It studies every phase in the…


      Perseverance Rover


      This rover and its aerial sidekick were assigned to study the geology of Mars and seek signs of ancient microbial…


      Parker Solar Probe


      On a mission to “touch the Sun,” NASA’s Parker Solar Probe became the first spacecraft to fly through the corona…


      Juno


      NASA’s Juno spacecraft entered orbit around Jupiter in 2016, the first explorer to peer below the planet’s dense clouds to…

      View the full article
    • By NASA
      Ruidoso, New Mexico lay in an unusual hush on June 20, 2024. During any normal summer day, the village in the southern part of the state lives up to the Spanish translation of its name — noisy. 

      But the bustle of this vacation hotspot, which attracts nearly 2 million visitors each year, was stifled by a mandatory evacuation order issued as wildfires raged unchecked across Lincoln County and the Mescalero Apache Reservation.  After four days of fires, news of the disaster began spreading to surrounding communities.

      Wildfires cast an orange haze over the Sierra Blanca mountain range in Ruidoso, New Mexico, on June 20, 2024. Image courtesy of James Herrera At NASA’s White Sands Test Facility (WSTF), Fire Department Deputy Chief James Herrera and his team were on high alert from the moment the blaze began.  
      “There were so many rumors, so many things going on,” Herrera said. “People were saying the town was completely burning down. We were expecting the worst before we even got there.” 
      Herrera’s expectations were realistic.  
      Tinderbox conditions, rough terrain, and winds reaching more than 70 miles per hour fueled the flames raging at the South Fork area west of Ruidoso, devouring nearly 5,000 acres just hours after the fire started. 
      As first responders expended every resource available to them both on the ground and in the air, a second fire — the Salt Fire — broke out on tribal land south of the village. 
      Now the twin infernos closed in on Ruidoso like a set of jaws poised to snap shut.  
      Gov. Michelle Lujan Grisham quickly declared a state of emergency and the early whispers crescendoed into an urgent plea for aid from anyone who would listen. 
      There was no doubt in Herrera’s mind: WSTF, based 150 miles from Ruidoso in Las Cruces, New Mexico, would answer the call.  
      “Never once did [WSTF leadership] say ‘Sorry, we can’t help,’” he said. “They asked, ‘What can we do to help? How can we get there as soon as possible?’”  
      Shift changes made for an earliest possible departure at dawn on June 20. The WSTF Fire Department spent the night preparing their truck, gathering their belongings, and bracing for the uncertain. 
      “We didn’t know where we were going to sleep, there were no hotels, everything was closed,” Herrera said. “More than likely, we were going to end up sleeping in our engine.”

      For the moment, rest was off the table.  
      “I’m not going to lie, we probably didn’t even sleep. I know I didn’t,” Herrera said. “I closed my eyes, and it was two o’clock in the morning. Time to get going.” 
      After checking in at the Incident Command Post, Herrera and the WSTF team — Lieutenant Gary Sida, firefighters Steven Olsson and Gabriel Rodriguez, and driver and engineer Tommy Montoya — were deployed to Ruidoso’s Casino Apache Travel Center off Highway 70.

      Deputy Chief James Herrera (far left) and his crew (L-R) Driver/Operator Tommy Montoya, Firefighter Gabe Rodriguez (top), Lieutenant Gary Sida, and Firefighter Stephen Olsson return to a hero’s welcome at White Sands Test Facility in Las Cruces, New Mexico. NASA/Anthony Luis Quiterio When Herrera and his four-man crew reached the edge of the deserted mountain town, the silence was more than unusual. It was unsettling, as heavy as the smoke suffocating the Sierra Blanca Peak. 
      “You could not see more than 100 feet,” Herrera said. “The only sign of life was all the fire agencies that were there. It was an eerie feeling.” 
      NASA’s arrival on scene brought a shift from anxiety to optimism and relief. 
      “There were tears in some of their eyes because we were showing up to help,” he said. “I could hear people saying, ‘What’s NASA doing here?’” He added, “One gentleman asked us how we got there. I joked that we drove the whole line from Kennedy Space Center.” 
      By the afternoon, the light-heartedness among comrades was extinguished as escalating winds charged the situation to a fever pitch. The fire, once perched atop the mountains, began hurling down in a landslide of embers, leaping across Highway 70, and forming a nearly complete ring of danger.  
      Breathing grew difficult as ground crews, with aerial units roaring overhead, battled a relentless assault of heat. WSTF Fire Department’s assignment evolved into an effort to protect anything and everything within reach.  “It makes you realize how fast something can be taken away from you,” Herrera said.

      The NASA WSTF Fire Department makes engine preparations along U.S. Route 70 at the Ruidoso border. Image courtesy of James Herrera Though disaster descended in an instant, the day itself had been long. Herrera and his team were released from duty after a grueling 12 hours spent providing critical support to wildland units and successfully protecting nearby buildings.  
      “Once it starts to calm down, you can feel your hands start to shake a little bit because this thing was getting out of control really fast,” Herrera said.  
      By the weekend, containment efforts were gaining ground thanks to the efforts of a combined 780-strong emergency response force. Eager to rebuild, Ruidoso residents trickled back in, but the village soon encountered another challenge: rain.
      Following the South Fork and Salt fires — which claimed an estimated 25,000 acres, 1,400 structures, and two lives — monsoons battered Ruidoso. Throughout July, deluges washed over the region’s burn scars in an ironic insult to injury leaving people trapped in vehicles and homes underwater. As recently as Aug. 7, evacuations continued as the Ruidoso Police Department worked to preemptively clear the Cherokee Mobile Village due to past flash flooding in the area.  
      In this harsh landscape of crisis and aftermath, Herrera views mutual aid as more than a tactical response, but a vital investment. 
      “Building goodwill with the community is akin to cultivating fertile ground for growth and success,” he said. “I strongly feel it strengthens the bond between us and our community.”  
      With the wet season expected to continue through the end of September, Ruidoso’s forecast remains uncertain. Even as storm clouds gather, one thing is clear: if the call comes again, the WSTF Fire Department will always be ready to answer.
      View the full article
    • By European Space Agency
      Video: 00:03:12 There’s a mystery out there in deep space – and solving it will make Earth safer. That’s why the European Space Agency’s Hera mission is taking shape – to go where one particular spacecraft has gone before.
      On 26 September 2022, moving at 6.1 km/s, NASA’s DART spacecraft crashed into the Dimorphos asteroid. Part of our Solar System changed. The impact shrunk the orbit of the Great Pyramid-sized Dimorphos around its parent asteroid, the mountain-sized Didymos.
      This grand experiment was performed to prove we could defend Earth against an incoming asteroid, by striking it with a spacecraft to deflect it. DART succeeded. But that still leaves many things scientists don’t know: What is the precise mass and makeup of Dimorphos? What did the impact do to the asteroid? How big is the crater left by DART’s collision? Or has Dimorphos completely cracked apart, to be held together only by its own weak gravity?
      That’s why we’re going back – with ESA’s Hera mission. The spacecraft will revisit Dimorphos to gather vital close-up data about the deflected body, to turn DART’s grand-scale experiment into a well-understood and potentially repeatable planetary defence technique.
      The mission will also perform the most detailed exploration yet of a binary asteroid system – although binaries make up 15% of all known asteroids, one has never been surveyed in detail.
      Hera will also perform technology demonstration experiments, including the deployment ESA’s first deep space ‘CubeSats’ – shoebox-sized spacecraft to venture closer than the main mission then eventually land – and an ambitious test of 'self-driving' for the main spacecraft, based on vision-based navigation.
      By the end of Hera’s observations, Dimorphos will become the best studied asteroid in history – which is vital, because if a body of this size ever struck Earth it could destroy a whole city. The dinosaurs had no defence against asteroids, because they never had a space agency. But – through Hera – we are teaching ourselves what we can do to reduce this hazard and make space safer.
      View the full article
  • Check out these Videos

×
×
  • Create New...