Gemini News Archive

Characterizing a Methane Dwarf with a Dead Stellar Companion

The discovery of an unusual stellar system combined with Gemini North NIRI observations has allowed astronomers to confirm the spectral type of a cool methane dwarf and determine its temperature, mass, and age with confidence. 

Tracing Elements to Measure the Age of a Star Cluster

Phillip Cargile (Vanderbilt University) and team take advantage of the time-dependent destruction of lithium in young stars to measure the age of the open cluster Blanco 1.

Gemini South's Mirror Glistens

A pristine new coat of protected silver now glistens on the Gemini South primary mirror (M1) as part of a routine shut-down on Cerro Pachón in Chile.

The Coolest Brown Dwarf: A Neighbor in Space

A team of astronomers have discovered what is currently the coldest star-like object. The object, called UGPS J0722-05, is also of particular interest because it is one of our closest neighbors.


Amateur astronomers used high-speed, video-monitoring equipment to capture a fireball streaking through the atmosphere of Jupiter. Shortly thereafter, the world’s largest telescopes examined Jupiter for debris left behind.

Young Star Reveals “Mature” Debris Disk

Astronomers have used the Thermal-Region Camera Spectrograph (T-ReCS) on the Gemini South telescope to obtain the first resolved image of the debris disk around the 12 million year old star HD191089.

A Very Young Circumstellar Disk in Scattered Light

Recent observations with the Near-Infrared Imager (NIRI) on the Gemini North telescope have revealed the presence of a large circumstellar disk around the young embedded protostar L1527.

Evidence for Galaxy Interactions in Powerful Radio Galaxies

Cristina Ramos Almeida and collaborators obtained deep imaging data using the Gemini Multi-Object Spectrograph (GMOS) at the Gemini South telescope to study the morphologies of a complete sample of 46 intermediate redshift (0.05<z<0.7) PRGs.

Brown Dwarf Careens Around a Young Solar Analogue

Using NICI on the Gemini-South telescope in Chile, an international team led by University of Hawai‘i astronomers have directly imaged a brown dwarf in a tight orbit around a young Sun-like star. 

Initial Scientific Results from NICI

The first two accepted papers based on observations with NICI at Gemini South include discoveries of several previously unknown companions in binary star systems as well as the study of the age distributions of stars in the outer regions of the galaxy M83.


A planet only about eight times the mass of Jupiter has been confirmed orbiting a Sun-like star at over 300 times farther from the star than the Earth is from our Sun. The newly confirmed planet is the least massive planet known to orbit at such a great distance from its host star.

A Ceres-like Dwarf Planet Swallowed by a White Dwarf Star

A Canadian-U.S. team's analysis, based on follow-up observations using the Gemini North telescope and the Multiple-Mirror Telescope (MMT), shows a clear signature of a tidally destroyed dwarf planet that once orbited the parent star.

Identifying Green Fuzzy Emission in the Milky Way

Using NIRI on the Gemini North telescope, James De Buizer and William Vacca (SOFIA-USRA) obtained spectra that, for the first time, directly identify the origin of “green fuzzy” emission.


The starburst galaxy NGC 1313 is a stellar incubator delivering stars on a scale rarely seen in a single galaxy of its size. Now a striking new Gemini Observatory image reveals the multitudes of glowing gas clouds in this galaxy’s arms.


A newly discovered gravitational lens in a relatively nearby galaxy cluster is leading astronomers to conclude that the cluster hosts the most massive galaxy known in our local universe. 

Minimizing Gemini’s Environmental Impact

Gemini Observatory aims to be one of the most energy efficient astronomical facilities, with the highest standards of environmental protection.

A Planet-like Companion Growing up in the Fast Lane

The discovery of a very young planet-like object, paired with a low-mass brown dwarf. appears to have formed in about a million years–more rapidly than some theories of planet formation predict.

A New View of the Owl Nebula: Canadian Student Imaging Contest Shines

A striking new Gemini Observatory image of the Owl Nebula, a prominent object visible in the northern sky, was released today (March 25, 2010) as the culmination of a nationwide student essay contest in Canada.

Underweight or Blinded by Youth? Finding the True Mass of Galaxy Mergers

Barry Rothberg and Jacqueline Fischer of the Naval Research Lab find that IR-luminous mergers appear younger and less massive in the near-IR but indistinguishable from old, massive ellipticals at optical wavelengths.

Black Hole May Fuel Galactic Mass Exodus

An international team provides insight into the consequences of galaxy-scale outflows using new observations with NIFS on Gemini North.