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4 August 2020: New detailed observations with NSF’s NOIRLab facilities reveal a young exoplanet, orbiting a young star in the Hyades cluster, that is unusually dense for its size and age. Weighing in at 25 Earth-masses, and slightly smaller than Neptune, this exoplanet’s existence is at odds with the predictions of leading planet formation theories.

1 April 2013: Watching starbirth isn’t easy: tens of millions of years are needed to form a star like our Sun. Much like archeologists who reconstruct ancient cities from shards of debris strewn over time, astronomers must reconstruct the birth process of stars indirectly, by observing stars in different stages of the process and inferring the changes that take place. Studies show that half of the common stars, including our Sun, formed in massive clusters, rich with young stars, from which they eventually escape. As part of his PhD thesis work, Thomas Allen, University of Toledo, has been observing such a region where stars are forming.

18 December 2012: As an end of the year finale, the National Optical Astronomy Observatory (NOAO) and WIYN partners offer this new wide-field image of the Cygnus loop. Three degrees on a side, this image covers an area of the sky about 45 times that of the full moon. But it does so without sacrificing high resolution. The image is over 600 million pixels in size, making it one of the largest astronomical images ever made.

22 July 2008: Astronomer Pierre Martin, director of science operations at the Canada-France-Hawaii Telescope (CFHT), has been selected as the new director of the WIYN Observatory, which operates 3.5-meter and 0.9-meter telescopes on Kitt Peak.

9 January 2008: Observations of the interacting binary star using telescopes at Kitt Peak National Observatory and NASA’s Spitzer Space Telescope suggest that the disks of hot gas that accumulate around a wide variety of astronomical objects—from degenerate stars in energetic binary systems to supermassive black holes at the hearts of active galaxies—are likely to be much larger than previously believed.

8 July 2005: High school teachers making observations with the research telescopes at Kitt Peak National Observatory as part of an intensive professional development workshop obtained some of the earliest multicolor imaging and spectra of a newly exploded massive star in a nearby galaxy.

25 May 2004: This image of Comet C/2001 Q4 (NEAT) was taken at the WIYN 0.9-meter telescope at Kitt Peak National Observatory near Tucson, AZ, on May 7, 2004.

22 January 2004: A duo of Chinese and American astronomers have discovered a young star in the fierce environs of the Rosette Nebula that is ejecting a complex jet of material riddled with knots and bow shocks.

10 May 2003: In one of the largest and most detailed celestial images ever made, the coil-shaped Helix Nebula is being unveiled today in celebration of Astronomy Day. The resulting composite picture is a seamless blend of ultra-sharp NASA Hubble Space Telescope images combined with the wide view of the Mosaic Camera on the WIYN 0.9-meter telescope at Kitt Peak National Observatory near Tucson, Arizona. The image shows a fine web of filamentary “bicycle-spoke” features embedded in the colorful red and blue gas ring, which is one of the nearest planetary nebulae to Earth.

5 March 2003: A team of astronomers headed by Frank Winkler of Middlebury College has combined precise digital observations with simple mathematics to estimate the apparent brightness of an exploding star whose light reached Earth nearly a thousand years ago, when it produced a display that was probably the brightest stellar event witnessed in recorded human history.

21 August 2002: Students from Yale University used the WIYN 0.9-meter telescope at Kitt Peak National Observatory to capture a series of still images of asteroid 2002 NY40 on August 15-16, two nights before its close flyby of Earth.

3 June 2002: New observations of the richly populated star cluster NGC 2420 taken by the refurbished WIYN 0.9-meter telescope at Kitt Peak National Observatory suggest that the cluster contains a multitude of clues about the history and evolution of the Milky Way.

19 March 2001: A consortium led by the University of Wisconsin-Madison, Indiana University and Yale University has been selected to assume operational responsibility for the historic 0.9-meter (36-inch) telescope at the National Science Foundation's Kitt Peak National Observatory.

25 March 1999: Astronomers using the National Science Foundation's (NSF) Kitt Peak National Observatory (KPNO), near Tucson, Arizona, contributed important optical observations of a Gamma-Ray Burst (GRB) discovered on 23 January 1999. The KPNO observations of this particularly powerful and well-observed GRB are included in articles appearing in current issues of the journals Science and Nature. This event was the first GRB detected simultaneously at optical and gamma-ray wavelengths, and may provide the first clear evidence that GRBs emit a stream, or jet, of photons directed out into space like a searchlight.

6 January 1999: Astronomers George H. Jacoby and Taft E. Armandroff of the National Optical Astronomy Observatories in Tucson, Arizona, and James E. Davies of The Johns Hopkins University announced today their discovery of a new galaxy in The Local Group, the group of galaxies within 4 million light-years of our own Milky Way. The new galaxy is the second one that the team has found in the past year by using new computer enhancement techniques applied to 10-year old photographs of the sky. Small galaxies of the type found by Jacoby and collaborators are the most common type of galaxy in the universe, yet the region around the Milky Way Galaxy's big brother, the spiral galaxy in Andromeda, had been thought to be highly deficient of these "dwarf" galaxies before the team began their search. The census of the Local Group, though, is now as high as 43 galaxies, meaning that our neighborhood may not be as unusual as was previously thought.