Gemini News Archive

Identifying Cool Brown Dwarfs With GNIRS

Spectroscopy obtained with the Gemini Near-Infrared Spectrograph (GNIRS) on the Gemini North telescope combined with photometry from the Spitzer Space Telescope enable the identification of a late-type brwon dwarf's spectral type as T8.5.

Australian Students Capture Dancing Galaxies

High school students from across Australia joined in a competition to obtain scientifically useful (and aesthetically pleasing) images using the Gemini Observatory. The winning image is an interacting galaxy pair NGC 6872 and IC 4970.

Journey Through the Universe – Seven Years of Exploration

Seven years ago, Gemini Observatory began a modest program in our local Big Island community called Journey Through the Universe (JTtU).


For the first time, observations with the Gemini Observatory clearly reveal an extreme, large-scale galactic outflow that brings the cosmic dinner to a halt.

AstroDay Chile and Journey through the Universe in La Serena

AstroDay Chile, which started as a mere handful of booths and kiosks from AURA observatories in 2005, has grown to host more than 17 institutions from Chile and beyond. 

Gemini South Shines First Sodium Laser “Constellation”

A new era in high-resolution astronomy began with the successful propagation of a 5-star sodium laser guide star "constellation" in the skies over Cerro Pachon in Chile.

2009 Collision with Jupiter - On the Rocks

After more than a year of studying the 2009 collision with Jupiter, a team's results indicate that the colliding body was rocky and not an icy comet like the last known collision with Jupiter.

On-sky Laser Propagation at Gemini South!

On the night of January 21-22, 2011 the Gemini South 50-watt laser began on-sky engineering testing and commissioning with its successful propagation into the sky over the summit of Cerro Pachón in Chile.

Astronomers 'Weigh' Heaviest Known Black Hole in our Cosmic Neighborhood

Astronomers have measured the most massive known black hole in our cosmic neighborhood by combining data from a giant telescope in Hawai'i and a smaller telescope in Texas. 

Helium Enhancement and the History of Omega Centauri

 New work led by Andrea Dupree (Harvard-Smithsonian Center for Astrophysics) now shows direct evidence for helium abundance variations—a sign of multiple histories—in the bright globular cluster Omega Centauri.

Gemini Hosts Workforce Diversity Meeting

On December 6-8, 2010 about a dozen representatives from AURA converged at Gemini’s base facility in Hilo, Hawai‘i to discuss a broad range of topics related to diversity in the workforce.

Jupiter Shows First Signs of its Returning Belt

The composite image, taken on Nov. 18, 2010 by the Gemini North telescope in Hawaii, shows a belt that had previously vanished in Jupiter's atmosphere is now reappearing.

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.