Free Republic 1st Qtr 2024 Fundraising Target: $81,000 Receipts & Pledges to-date: $58,647
72%  
Woo hoo!! And we're now over 72%!! Thank you everyone!! God bless.

Keyword: crabnebula

Brevity: Headers | « Text »
  • Astronomy Picture of the Day - The Multiwavelength Crab

    03/04/2022 2:17:36 PM PST · by MtnClimber · 30 replies
    APOD.NASA.gov ^ | 4 Mar,2022 | NASA, ESA, G. Dubner (IAFE, CONICET-University of Buenos Aires) et al.; A. Loll et al.; T. Temim et
    Explanation: The Crab Nebula is cataloged as M1, the first object on Charles Messier's famous list of things which are not comets. In fact, the Crab is now known to be a supernova remnant, expanding debris from massive star's death explosion, witnessed on planet Earth in 1054 AD. This brave new image offers a 21st century view of the Crab Nebula by presenting image data from across the electromagnetic spectrum as wavelengths of visible light. From space, Chandra (X-ray) XMM-Newton (ultraviolet), Hubble (visible), and Spitzer (infrared), data are in purple, blue, green, and yellow hues. From the ground, Very Large...
  • Atronony Picture Of The Day, June 30, 2003

    07/01/2003 1:43:03 PM PDT · by Greeblie · 31 replies · 280+ views
    NASA ^ | June 30, 2003 | NASA
    Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2003 June 30 Disappearing Clouds in Carina Credit: Hubble Heritage Team (STScI/AURA), N. Walborn (STScI) & R. Barbß (La Plata Obs.), NASA Explanation: This dense cloud of gas and dust is being deleted. Likely, within a few million years, the intense light from bright stars will have boiled it away completely. Stars not yet formed in the molecular cloud's interior will then stop growing. The cloud has broken off of part of the greater...
  • 900-year-old Chinese supernova mystery points to strange nebula

    09/17/2021 7:20:16 AM PDT · by BenLurkin · 25 replies
    Space.com ^ | Doris Elin Urrutia
    In the year 1181 AD, a new bright point of light as luminous as the planet Saturn appeared to Chinese and Japanese skygazers for a little more than six months before disappearing. Hundreds of years later, researchers believe they have finally found the source of this mysterious appearance. The event, like the famous Crab Nebula-forming stellar explosion of 1054, is one of just a handful of bright nearby flashes noted in historical records, but unlike the Crab Nebula, the 1181 spectacle was tricky to pin down. The historical record leaves a few clues that have been useful to modern astronomers....
  • Ancient supernovae may be recorded in Antarctic ice

    03/03/2009 9:58:29 PM PST · by rdl6989 · 18 replies · 493+ views
    newscientist.com ^ | Mar 3, 2009 | by Stephen Battersby
    A newly examined ice core shows what may be the chemical traces of supernovae that exploded a thousand years ago. Yuko Motizuki of the RIKEN research institute in Wako, Japan, and colleagues analysed the nitrate content of an ice core drilled at Dome Fuji station in Antarctica. Nitrate is produced in the atmosphere by nitrogen oxides, which in turn should be created by the gamma radiation from a supernova. Motizuki's group found high nitrate concentrations in three thin layers about 50 metres deep. Because snow gradually builds up into layers of ice, depth indicates age. After calibrating this icy calendar...
  • Substantial Lack Of Phosphorus In The Universe Makes Finding Alien Life Unlikely

    04/05/2018 11:49:13 AM PDT · by LibWhacker · 57 replies
    Tech Times ^ | 4/5/18 | Allan Adamson
    Amid efforts to find alien life, scientists have not yet confirmed the existence of an extraterrestrial civilization. Findings of a new study suggest this has something do with the element phosphorus lacking in the cosmos. Life-Giving PhosphorusPhosphorus is the 11th most common element on Earth, and it is fundamental to all living things. Phosphorus is one of only six chemical elements on our planet that organisms depend on. "[Phosphorus] helps form the backbone of the long chains of nucleotides that create RNA and DNA; it is part of the phospholipids in cell membranes; and is a building block of the...
  • Astronomy Picture of the Day -- The Swirling Core of the Crab Nebula

    07/07/2016 10:04:25 PM PDT · by SunkenCiv · 11 replies
    NASA ^ | Friday, July 08, 2016 | (see photo credit)
    Explanation: At the core of the Crab Nebula lies a city-sized, magnetized neutron star spinning 30 times a second. Known as the Crab Pulsar, it's actually the rightmost of two bright stars, just below a central swirl in this stunning Hubble snapshot of the nebula's core. Some three light-years across, the spectacular picture frames the glowing gas, cavities and swirling filaments bathed in an eerie blue light. The blue glow is visible radiation given off by electrons spiraling in a strong magnetic field at nearly the speed of light. Like a cosmic dynamo the pulsar powers the emission from the...
  • Astronomy Picture of the Day -- M1: The Crab Nebula from Hubble

    08/16/2015 7:06:58 AM PDT · by SunkenCiv · 16 replies
    NASA ^ | August 16, 2015 | (see photo credit)
    Explanation: This is the mess that is left when a star explodes. The Crab Nebula, the result of a supernova seen in mysterious filaments. The filaments are not only tremendously complex, but appear to have less mass than expelled in the original supernova and a higher speed than expected from a free explosion. The featured image, taken by the Hubble Space Telescope, is presented in three colors chosen for scientific interest. The Crab Nebula spans about 10 light-years. In the nebula's very center lies a pulsar: a neutron star as massive as the Sun but with only the size of...
  • Astronomy Picture of the Day -- Sharpless 249 and the Jellyfish Nebula

    12/04/2014 2:01:46 PM PST · by SunkenCiv · 3 replies
    NASA ^ | December 03, 2014 | (see photo credit)
    Explanation: Normally faint and elusive, the Jellyfish Nebula is caught in this alluring telescopic mosaic. The scene is anchored right and left by two bright stars, Mu and Eta Geminorum, at the foot of the celestial twin while the Jellyfish Nebula is the brighter arcing ridge of emission with dangling tentacles below and right of center. In fact, the cosmic jellyfish is part of bubble-shaped supernova remnant IC 443, the expanding debris cloud from a massive star that exploded. Light from the explosion first reached planet Earth over 30,000 years ago. Like its cousin in astrophysical waters the Crab Nebula...
  • Astronomy Picture of the Day -- M1: The Crab Nebula

    11/23/2014 11:14:59 AM PST · by SunkenCiv · 16 replies
    NASA ^ | November 21, 2014 | (see photo credit)
    Explanation: The Crab Nebula is cataloged as M1, the first object on Charles Messier's famous 18th century list of things which are not comets. In fact, the Crab is now known to be a supernova remnant, debris from the death explosion of a massive star, witnessed by astronomers in the year 1054. This sharp, ground-based telescopic view uses narrowband data to track emission from ionized oxygen and hydrogen atoms (in blue and red) and explore the tangled filaments within the still expanding cloud. One of the most exotic objects known to modern astronomers, the Crab Pulsar, a neutron star spinning...
  • Astronomy Picture of the Day -- M1: The Incredible Expanding Crab

    09/05/2013 7:37:34 PM PDT · by SunkenCiv · 7 replies
    NASA ^ | September 05, 2013 | (see photo credit)
    Explanation: The Crab Nebula is cataloged as M1, the first on Charles Messier's famous list of things which are not comets. In fact, the Crab is now known to be a supernova remnant, an expanding cloud of debris from the explosion of a massive star. The violent birth of the Crab was witnessed by astronomers in the year 1054. Roughly 10 light-years across today, the nebula is still expanding at a rate of over 1,000 kilometers per second. Want to watch the Crab Nebula expand? Check out this video (vimeo) animation comparing an image of M1 taken in 1999 at...
  • Astronomy Picture of the Day 04-08-04

    04/07/2004 9:39:54 PM PDT · by petuniasevan · 7 replies · 139+ views
    NASA ^ | 04-08-04 | Robert Nemiroff and Jerry Bonnell
    Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2004 April 8 Elusive Jellyfish Nebula Credit & Copyright: Johannes Schedler (Panther Observatory) Explanation: Normally faint and elusive, the Jellyfish Nebula is caught in the net of this spectacular wide-field telescopic view. Flanked by two yellow-tinted stars at the foot of a celestial twin - Mu and Eta Geminorum - the Jellyfish Nebula is the brighter arcing ridge of emission with dangling tentacles just right of center. Here,...
  • Astronomy Picture of the Day -- The Elusive Jellyfish Nebula

    01/09/2013 4:51:54 PM PST · by SunkenCiv · 9 replies
    NASA ^ | January 09, 2012 | (see photo credit)
    Explanation: Normally faint and elusive, the Jellyfish Nebula is caught in this alluring telescopic view. Drifting near bright star Eta Geminorum, at the foot of a celestial twin, the Jellyfish Nebula is seen dangling tentacles from the bright arcing ridge of emission left of center. In fact, the cosmic jellyfish is part of bubble-shaped supernova remnant IC 443, the expanding debris cloud from a massive star that exploded. Light from the explosion first reached planet Earth over 30,000 years ago. Like its cousin in astrophysical waters the Crab Nebula supernova remnant, IC 443 is known to harbor a neutron star,...
  • Astronomy Picture of the Day -- M1: The Crab Nebula from Hubble

    12/25/2011 4:22:54 PM PST · by SunkenCiv · 54 replies
    NASA ^ | December 25, 2011 | (see photo credit)
    Explanation: This is the mess that is left when a star explodes. The Crab Nebula, the result of a supernova seen in 1054 AD, is filled with mysterious filaments. The filaments are not only tremendously complex, but appear to have less mass than expelled in the original supernova and a higher speed than expected from a free explosion. The above image, taken by the Hubble Space Telescope, is presented in three colors chosen for scientific interest. The Crab Nebula spans about 10 light-years. In the nebula's very center lies a pulsar: a neutron star as massive as the Sun but...
  • Astronomy Picture of the Day -- An Unexpected Flare from the Crab Nebula

    05/23/2011 7:32:00 PM PDT · by SunkenCiv · 32 replies
    NASA ^ | May 23, 2011 | (see photo credit)
    [Credit: NASA, DOE, Fermi LAT, R. Buehler (SLAC, KIPAC)] Explanation: Why does the Crab Nebula flare? No one is sure. The unusual behavior, discovered over the past few years, seems only to occur in very high energy light -- gamma rays. As recently as one month ago, gamma-ray observations of the Crab Nebula by the Fermi Gamma Ray Space Telescope showed an unexpected increase in gamma-ray brightness, becoming about five times the nebula's usual gamma-ray brightness, and fading again in only a few days. Now usually the faster the variability, the smaller the region involved. This might indicate that the...
  • Crab Nebula's gamma-ray flare mystifies astronomers

    05/11/2011 9:03:57 PM PDT · by NormsRevenge · 26 replies
    BBC News ^ | 5/11/11 | Jason Palmer
    The Crab Nebula has shocked astronomers by emitting an unprecedented blast of gamma rays, the highest-energy light in the Universe. The cause of the 12 April gamma-ray flare, described at the Third Fermi Symposium in Rome, is a total mystery. It seems to have come from a small area of the famous nebula, which is the wreckage from an exploded star. The object has long been considered a steady source of light, but the Fermi telescope hints at greater activity. The gamma-ray emission lasted for some six days, hitting levels 30 times higher than normal and varying at times from...
  • Intricate Crab Nebula Poses for Hubble Close-Up

    12/01/2005 9:20:51 PM PST · by NormsRevenge · 45 replies · 1,175+ views
    Space.com on Yahoo ^ | 12/1/05 | Tariq Malik
    The Hubble Space Telescope has caught the most detailed view of the Crab Nebula, revealing the intricate epitaph of a long-dead star. The nebula spans a patch of space six light-years across and has proved an attractive target for professional and amateur astronomers alike. One light-year is the distance light travels in one year, about 5.8 trillion miles (9.7 trillion kilometers). Wispy filaments, primarily of hydrogen, weave through the Crab Nebula, at the center of which sits a neutron star that spins 30 times per second. The only fixed remains of the supernova explosion - the rest of the original...
  • Stunning New View of Energetic Crab Pulsar

    Stunning New View of Energetic Crab Pulsar Fri Sep 20, 9:24 AM ET By SPACE.com Staff, SPACE.com Combining the power of the Hubble Space Telescope ( news - web sites) with the Chandra X-ray Observatory, researchers have made a short movie of a massive rotating star that provides new clues about how the powerful object works. Scientists gathered data at different times over several months with the two orbiting observatories, examining the so-called Crab Nebula and its dense, Manhattan-sized pulsing neutron star. The rapidly spinning star generates incredible pulses of magnetic energy that scientists still struggle to understand. "Through...