New mid-infrared images of the Zeta Leporis circumstellar disk obtained with T-ReCS on Gemini South have for the first time revealed what researchers are calling an "exo-asteroid belt" around another star.
Astronomers have announced the discovery of huge quantities of an unusual variety of oxygen in two very rare types of stars, suggesting that the origin of these oddball stars may lie in the physics behind the mergers of white dwarf star pairs.
An international team of astronomers used a novel approach to peer deeply into the energetic core of the nearby galaxy Centaurus A and set stringent constraints on its size and characteristics, indicating that it is likely quite petite and clumpy.
The images were obtained as part of a program to capture a time-lapse sequence of the Gemini telescopes in operation during the course of one night.
A team of US astronomers has just released the results of a search for low-mass brown dwarf or planetary companions around young early-type M dwarf stars within 20 parsecs of the Sun.
An extremely rare stellar system composed of a white dwarf and brown dwarf pair, WD 0137-349 is the only known close, detached binary system with a white dwarf and a confirmed substellar companion.
Robert A. Simcoe of the MIT has found new evidence of intensive heavy-element enrichment in intergalactic gas, occurring less than 1 billion years (Gyr) after the Big Bang, with the help of GNIRS at Gemini South.
An international team of researchers used Gemini mid-infrared images to investigate a sample of nearby Luminous InfraRed Galaxies (LIRGs).
Using CIRPASS at Gemini South, Ruben Diaz and an international team of astronomers have discovered a previously unknown hidden mass concentration that looks like a second nucleus in the starburst galaxy M83.
Alicia M. Soderberg (CALTECH) and her collaborators have studied the GRB 051221a and its afterglow in great detail using several datasets provided by space observations, radio observations with the VLA and optical observations with Gemini.
An international team has found that 45% of a small sample (20) of massive high-redshift galaxies exhibit very low or no star formation activity.
Hai Fu and Alan Stockton of the Institute for Astronomy (University of Hawai'i) recently constructed velocity maps of the gas in the EELR around the quasar (which is at a redshift of z=0.31) using the Gemini Multi-Object Spectrograph on Gemini North.
A team of astronomers has proven that the star at the core of a spectacular cosmic bow shock near the Galactic Center is indeed an evolved massive star.
Gemini North adaptive optics image of Jupiter and its two red spots (which appear white because this is a near-infrared image; in visible light they appear reddish).
Astronomers have just released new Gemini/HST results confirming that big galaxies form first and smaller ones later.
Massive star supernovae have been major "dust factories" ever since the first generations of stars formed several hundred million years after the Big Bang, according to an international study.
Gemini observations reveal an intriguing dust-enshrouded star near the core of the galaxy M31, while extremely sharp adaptive optics images allowed the analysis of thousands of individual stars that indicates a long-stable environment around the galaxy’s core.
Two new images from Gemini Observatory released today show a pair of beautiful nebulae that were created by two very different types of stars at what may be similar points in their evolutionary timelines.