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21 Septiembre 2015: The Dark Energy Spectroscopic Instrument (DESI), destined for the 4-meter Mayall telescope at Kitt Peak National Observatory (KPNO), will chart out the role of dark energy in the expansion history of the universe. The US Department of Energy has announced its approval of Critical Decision 2 (CD-2) for the DESI project, authorizing its scientific scope, schedule, and funding profile. The Mayall telescope is operated by the National Optical Astronomy Observatory (NOAO).

19 Febrero 2014: The astronomical community was very excited by the appearance of a supernova in a relatively nearby galaxy in late January 2014. Observations of this supernova, located in the galaxy M 82, and referred to as SN 2014J revealed that it is a type Ia. These occur in a binary star system composed of a dense white dwarf star and a companion star, either another white dwarf or a bloated red giant star. These supernovae are especially interesting because they provide one of the best ways to measure distances to faint galaxies, and therefore calibrate the expansion of the universe. At Kitt Peak National Observatory (KPNO), two different teams have been observing SN 2014J.

4 Junio 2013: In a new study using the NOAO Kitt Peak National Observatory Mayall 4-meter telescope, observations of a large sample of stars with candidate planets identified by the NASA Kepler Mission have revealed that many of the stars, and hence their planets, are actually somewhat larger than originally thought. In addition, the researchers confirm that planets larger than Neptune are more likely to be found orbiting stars that contain more heavy elements (such as iron) than the Sun. Small planets, however, have been discovered around stars both rich and poor in metals.

13 Mayo 2013: For centuries, humans have pondered what life on other planets beyond our solar system might be like. With the launch of the Kepler Spacecraft in 2009 we now have evidence for the widespread existence of such planets. Kepler’s discovery of hundreds of planet candidates around other stars has inspired a new book that combines both science and science fiction: A Kepler’s Dozen: Thirteen Stories about Distant Worlds that Really Exist. This anthology is co-edited by David Lee Summers (author of The Pirates of Sufiro and editor of Space Pirates) and Dr. Steve Howell (Kepler Project Scientist). (Fig. 1)

12 Febrero 2013: This image of a planetary nebula, which may suggest a rose to some, was obtained with the wide-field view of the National Optical Astronomy Observatory (NOAO) Mosaic 1 camera on the Mayall 4-meter telescope at Kitt Peak National Observatory.

30 Noviembre 2011: The NASA Kepler Mission is designed to survey a portion of our region of the Milky Way Galaxy to discover Earth-size planets in or near the “habitable zone,” the region in a planetary system where liquid water can exist, and determine how many of the billions of stars in our galaxy have such planets. It now has another planet to add to its growing list. A research team led by Steve Howell, NASA Ames Research Center, has shown that one of the brightest stars in the Kepler star field has a planet with a radius only 1.6 that of the earth’s radius and a mass no greater that 10 earth masses, circling its parent star with a 2.8 day period. With such a short period, and such a bright star, the team of over 65 astronomers (that included David Silva, Ken Mighell and Mark Everett of NOAO) needed multiple telescopes on the ground to support and confirm their Kepler observations. These included the 4 meter Mayall telescope and the WIYN telescope at Kitt Peak National Observatory. The accompanying figure shows the size of the Kepler field, seen over Kitt Peak.

5 Octubre 2011: The 2011 Nobel Prize in Physics was awarded to Saul Perlmutter, Brian Schmidt, and Adam Riess for their discovery of the acceleration of the Universe, one of the more surprising cosmological results in modern astronomy. The discovery was enabled in large part through use of National Science Foundation (NSF) facilities operated by the National Optical Astronomy Observatory (NOAO) with headquarters in Tucson, Arizona and telescopes in Arizona and Chile.

31 Agosto 2011: This wide-field panorama of star formation was captured with the National Science Foundation’s Mayall 4-meter telescope on Kitt Peak. Located in the constellation of Orion (the Hunter), the image show a portion of one of Orion’s giant molecular clouds (known as “Orion A”) where new stars are forming.

30 Noviembre 2009: Using NEWFIRM on the Mayall 4-meter telescope at Kitt Peak, Veilleux, Rupke and Swaters have reported the discovery of warm H2 gas in the prototypical galactic wind of M82. They report filaments extending above and below the disk, roughly coincident with the location of the galactic wind in this galaxy.

15 Octubre 2009: Informally known as the "Soap Bubble Nebula", this planetary nebula (officially known as PN G75.5+1.7) was discovered by amateur astronomer Dave Jurasevich on July 6th, 2008. It was noted and reported by Keith Quattrocchi and Mel Helm on July 17th, 2008.

8 Enero 2008: A new wide-field image of Pickering’s Triangle taken with the National Science Foundation’s Mayall 4-meter telescope at Kitt Peak National Observatory is being released today in Austin, Texas, at the 211th meeting of the American Astronomical Society.

16 Mayo 2007: A dynamic image of the nearby star-forming region NGC 1333 taken at Kitt Peak National Observatory is being released today in honor of the retirement celebration for Stephen Strom, a two-time staff member of the U.S. national observatory who has led a multifaceted life in astronomy, public policy, and the arts.

21 Febrero 2007: A beautiful new image of spiral galaxy IC 342 that takes advantage of the dark night sky at Kitt Peak National Observatory is being released today in Washington, DC, at the opening of “The Night: Why Dark Hours Are So Important,” a two-day symposium hosted at the Carnegie Institution.

7 Enero 2007: The ghostly blue Bubble Nebula and a swan-like dark nebula known as Barnard 163 are featured in beautiful new images taken in 2006 using the Mayall 4-meter telescope at Kitt Peak National Observatory. The newly released images are displayed in large format at the NOAO exhibit booth starting today in Seattle at the 209th meeting of the American Astronomical Society.

7 Enero 2007: Astronomers studying highly energetic binary stars called polars have obtained the first observational evidence that the intense magnetic fields produced by the white dwarf half of the interacting pair can induce flares, sunspots and other explosive activity in its otherwise low-wattage, low-mass partner.

6 Diciembre 2005: More than half of the largest galaxies in the nearby universe have collided and merged with another galaxy in the past two billion years, according to a new study using hundreds of images from two of the deepest sky surveys ever conducted.

23 Junio 2005: All of the major telescopes of the National Optical Astronomy Observatory (NOAO) on Kitt Peak are observing comet Tempel 1 for several nights before and after the planned Deep Impact event. Indeed, by the night of July 8, Kitt Peak National Observatory will have been used for 43 nights in 2005 in scientific support of the planned collision at approximately 10:52 p.m. local time on July 3 between the icy comet and a special probe released from the main Deep Impact spacecraft.

2 Junio 2004: Astronomers have peered into the fog of the early universe and discovered a young and extremely distant galaxy at a time when the Universe was only about six percent of its present age. When compared with other recent findings about the “dark ages” of the early universe, this discovery suggests that this murky era could have lasted the better part of a billion years.

6 Octubre 2003: This image of the clouds of gas and dust next to the “neck” and “body” of the Pelican Nebula was taken by the National Science Foundation’s Mayall 4-meter telescope at Kitt Peak National Observatory near Tucson, AZ.

5 Marzo 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.