From HubbleSite: “This collage shows images of six different galaxy clusters taken with NASA’s Hubble Space Telescope and Chandra X-ray Observatory. The clusters were observed in a study of how dark matter in clusters of galaxies behaves when the clusters collide. Seventy-two large cluster collisions were studied in total. Using visible-light images from Hubble, […]
An illustration showing the distribution of the two dozen known dwarf satellite galaxies around the Milky Way. Astronomers have recently discovered nine more additional such candidate objects below the plane of the galaxy, shown here in red. Image Credit: S. Koposov, V. Belokurov (IoA, Cambridge). Background: 2MASS
The mystery of dark matter has dominated […]
A view of the Milky Way galaxy in visible wavelengths. Two recent studies have provided more evidence which indicate that our galaxy is dominated in dark matter. In the image, the blue and red dots pinpoint the rotation curve tracers that were used in one of the studies and were colour-coded according to their […]
A composite, multi-wavelength image of the young galaxy cluster XDCP J0044.0-2033, also known as the Gioiello Cluster, which is located 9.6 billion light-years away. In the image, X-ray wavelengths appear purple, infrared appear as large red halos around some galaxies, and visible light appears as are red, green, and blue. Image Credit: X-ray: NASA/CXC/INAF/P.Tozzi, […]
The Alpha Magnetic Spectrometer is seen here at center left, following its installation on the S3 Truss on the International Space Station by the crew of the STS-134 space shuttle mission in 2011. The orbiting particle detector has been continuously collecting data ever since, on high-energy cosmic rays. Image Credit: NASA
Some of the […]
Composite Chandra image of four supernovae: the Crab Nebula, Tycho, G292.0+1.8, and 3C58. Image Credit: NASA/CXC/SAO
The Chandra X-Ray Observatory, NASA’s space telescope which observes the universe using X-rays, has now completed its 15th year of operations, and astronomers are celebrating the anniversary with a series of special images from the orbiting observatory.
A view of the entire gamma-ray sky from the Fermi Space Telescope, shaded to emphasize the center of the Milky Way. The inset is a map of the galactic center with known sources removed, which reveals the gamma-ray excess (red, green, and blue) found there. This excess emission is consistent with annihilations from some […]
An image of galaxy cluster 1E 0657-56, also known as the Bullet Cluster. It is a composite image made from observations in visible light from the Hubble Telescope and the Magellan ground-based Telescopes (the main cluster image) and in x-ray wavelengths from the Chandra Space Observatory (pink areas). Additional studies of gravitational lensing from […]
Our latest view of the Universe and its history obtained by the ESA Planck space probe. Image Credit: ESA/Planck Collaboration/PA.
Recent findings from the European Space Agency’s Planck spacecraft have provided some minor revisions to the currently accepted parameters of the universe. As well as it now being 13.8 billion years old, the distribution […]
The International Space Station is a sprawling complex the size of a football field. However, after decades of designs, redesigns, and being placed in a less-than-optimal orbit, is the complex worth the $100 billion price tag? Image Credit: NASA
For a long time, it looked as if it would never happen: the Reagan-era Space […]