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universe

Spiral Galaxy NGC 6744

Beautiful spiral galaxy NGC 6744 is nearly 175,000 light-years across, larger than our own Milky Way. It lies some 30 million light-years distant in the southern constellation Pavo and appears as only a faint, extended object in small telescopes. We see the... Continue Reading →

Hoag’s Object: A Nearly Perfect Ring Galaxy

Is this one galaxy or two? This question came to light in 1950 when astronomer Arthur Hoag chanced upon this unusual extragalactic object. On the outside is a ring dominated by bright blue stars, while near the center lies a ball of much redder... Continue Reading →

Global geologic map of Titan

The first map of the global geology of Saturn's largest moon, Titan, has been completed, revealing a dynamic world with dunes, lakes, plains, craters and other terrains. The map is based on data from the international Cassini mission, which performed more than... Continue Reading →

Stars Are Being Born in the Depths of a Black Hole

Located about 5.8 billion light years from Earth in the Phoenix Constellation, astronomers have confirmed the first example of a galaxy cluster where large numbers of stars are being born at its core.  Galaxy clusters are the largest structures in... Continue Reading →

Astronauts Complete First Excursion to Repair Cosmic Particle Detector

Station Commander ​​Luca Parmitano of the European Space Agency conducts repairs while attached to the space station’s robotic arm during the first spacewalk to repair the Alpha Magnetic Spectrometer on Nov. 15, 2019. He and ​NASA astronaut Andrew Morgan (out of frame) worked for more than six... Continue Reading →

Highest-energy light from a gamma-ray burst ever

Gamma-ray bursts are the most powerful explosions in the cosmos. These explosive events last a fraction of a second to several minutes and emit the same amount of gamma rays as all the stars in the universe combined. Such extreme... Continue Reading →

Voyager 2 reaches interstellar space

Voyager 1 has a companion in the realm of the stars. Researchers at the University of Iowa report that the spacecraft Voyager 2 has entered the interstellar medium (ISM), the region of space outside the bubble-shaped boundary produced by wind... Continue Reading →

ESO telescope reveals what could be the smallest dwarf planet yet in the solar system

Astronomers using ESO's SPHERE instrument at the Very Large Telescope (VLT) have revealed that the asteroid Hygiea could be classified as a dwarf planet. The object is the fourth largest in the asteroid belt after Ceres, Vesta and Pallas. For... Continue Reading →

Mars once had salt lakes similar to those on Earth

Mars once had salt lakes that are similar to those on Earth and has gone through wet and dry periods, according to an international team of scientists that includes a Texas A&M University College of Geosciences researcher. Marion Nachon, a... Continue Reading →

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