Interiors of Rocky Exoplanets Might Be Different Than Earth's, According to New Study

Artist’s impression of the Super-Earth-type exoplanet HD 85512 b. As evidenced by the results of a new study, these rocky exoplanets, which are though to be similar to Earth, could have a different internal chemistry instead. Image Credit: ESO/M. Kornmesser/Nick Risinger

The steady stream of terrestrial exoplanet discoveries that have come from NASA’s Kepler […]

On Course to the Stars: James Webb Space Telescope Shaping Up for 2018 Launch

From ESA: “This image shows two polished test mirror segments being inspected by an optical engineer: one segment with the gold coating already applied, the other without. In the meantime, the coating of all 18 mirrors has been completed.” Photo Credit: NASA/C. Gunn

While the Hubble Space Telescope (HST) recently celebrated 25 years in […]

Two Years From Today: Get Ready For the Great American Solar Eclipse of 2017

A total eclipse of the Sun, showing the Sun's atmosphere, or corona, stretching out, which is not normally visible during daylight. Photo Credit: Fred Espenak/NASA's Goddard Space Flight Center

A total eclipse of the Sun, showing the Sun’s atmosphere, or corona, stretching out into space, which is not normally visible during daylight. Photo Credit: Fred Espenak/NASA’s Goddard Space Flight Center

Exactly two years from today, on Aug. 21, 2017, a rare total solar eclipse will be seen again in the skies of the […]

The Early Solar System Could Have Hosted a Fifth Giant Planet, According to New Study

Artist’s impression of a rogue gas giant planet, free-floating in interstellar space. According to a new study, the early Solar System hosted a fifth gas giant planet besides Jupiter, Saturn, Uranus, and Neptune, which was eventually ejected into interstellar space through the gravitational interactions with the rest of the Solar System’s giant planets. Image […]

The Coming of the Cosmic Old Age: New Survey Finds the Universe's Energy Output Is Decreasing With Time

A composite image of a galaxy as seen in different wavelengths by the GAMA survey. The results of the survey, which studied more than 200,000 galaxies in the local Universe, revealed that the latter’s total energy output has decreased by at least 50 percent during the last 2 billion years. Image Credit: ICRAR/GAMA and […]

Gemini Planet Imager Finds Its First Exoplanet, a Methane-Rich 'Young Jupiter'

Discovery image of the exoplanet 51 Eridani b taken by the Gemini Planet Imager on December 21 2014. Image Credit:  J. Rameau (UdeM)/C. Marois (NRC Herzberg)

Discovery near-infrared image of the exoplanet 51 Eridani b taken by the Gemini Planet Imager on Dec. 21, 2014. The relative size of Saturn’s orbit is also shown for comparison. Image Credit: Gemini Observatory/J. Rameau (UdeM)/C. Marois (NRC Herzberg)

The Gemini Planet Imager, a new telescopic instrument designed to find, image, and study faint, young planets orbiting bright stars, has discovered its first exoplanet: a young Jupiter-like planet called 51 Eridani b which orbits […]

New Study Traces Dark Near-Earth Asteroids Back to Oddball Asteroid Family

Time-lapse view of the asteroid Euphrosyne as seen by NASA's WISE spacecraft on May 17, 2010. WISE was later renamed to NEOWISE in 2013. Image Credit: NASA/JPL-Caltech

Time-lapse view of the asteroid Euphrosyne as seen by NASA’s WISE spacecraft on May 17, 2010. WISE was later renamed to NEOWISE in 2013. Image Credit: NASA/JPL-Caltech

Near-Earth asteroids, also known as Near Earth Objects (NEOs), are some of the best studied space rocks in the Solar System, primarily due to the fact that […]

Flight Plan for New Horizons' Historic Pluto Flyby Uploaded to Spacecraft as Surface Details Begin to Emerge

New Horizons scientists combined the latest black and white map of Pluto’s surface features (left) with a map of the planet’s colors (right) to produce a detailed color portrait of the planet’s northern hemisphere (center). Photo Credits: NASA/JHUAPL/SWRI

New Horizons scientists combined the latest black-and-white map of Pluto’s surface features (left) with a map of the planet’s colors (right) to produce a detailed color portrait of the planet’s northern hemisphere (center). Credits: NASA/JHUAPL/SWRI

New Horizons is now just 11 days from its historic flyby exploration of the Pluto system, some three billion miles […]

The Case of the Helium-Shrouded Exoplanet With the Hydrogen, Comet-Like Tail

An artist's concept of the vast envelope of atomic hydrogen that envelopes the nearby helium-dominated exoplanet Gliese 436b. The radiation pressure from the planet's host star causes the gradual escape over time of significant amounts of hydrogen from Gliese 436b's atmosphere into space, which subsequently forms a large comet-like tail that follows the planet in its orbit around its star. Image Credit: NASA, ESA, and G. Bacon (STScI)

An artist’s concept of the vast envelope of atomic hydrogen that envelopes the nearby helium-dominated exoplanet Gliese 436b. The radiation pressure from the planet’s host star causes the gradual escape over time of significant amounts of hydrogen from Gliese 436b’s atmosphere into space, which subsequently forms a large comet-like tail that follows the planet […]

Pluto Slowly Transitions From Astronomical Point Source to Fascinating World in Latest Images From New Horizons

Pluto is revealed as a fascinating planetary world in these latest images that were taken by New Horizons spacecraft between May 29-June 2. The images show four different “faces” of Pluto as it rotates about its axis with a period of 6.4 days. All the images have been rotated to align Pluto’s rotational axis […]