Anne's Image of the Day: Planetary Nebula Abell 70

Anne’s Image of the Day: Planetary Nebula Abell 70

November 30, 2013 Abell 70, a planetary nebula in Aquila Image Credit & Copyright: Adam Block/Mount Lemmon SkyCenter/University of Arizona (http://skycenter.arizona.edu/gallery/nebulae/Abell70) Abell 70 (also known as PN G038.1-25.4) is a planetary nebula that lies between 13,500 and 17,500 light-years away from Earth in the northern constellation of Aquila (the Eagle). It is approaching us at [continue reading]

Anne's Image of the Day: Hickson Compact Group 90

Anne’s Image of the Day: Hickson Compact Group 90

November 29, 2013 HCG 90, a small cluster of galaxies in Piscis Austrinus Image Credit: NASA, ESA, and R. Sharples (University of Durham) Hickson Compact Group 90 (HCG 90) is a tight cluster of 16 galaxies (including many dwarf galaxies), located approximately 100 million light-years away in the southern constellation of Piscis Austrinus (the Southern [continue reading]

Anne's Image of the Day: Hind's Variable Nebula

Anne’s Image of the Day: Hind’s Variable Nebula

November 28, 2013 Hind’s Variable Nebula, a variable nebula in Taurus Image Credit NOT Adam Block, what I thought. Does anybody know who made this image? Hind’s Variable Nebula (also known as NGC 1555, Sh2-238 or HH 155) is a variable nebula of about 4 light-years across, located some 400 light-years away from Earth at the edge [continue reading]

Anne's Image of the Day: Spiral Galaxy NGC 3982

Anne’s Image of the Day: Spiral Galaxy NGC 3982

November 27, 2013 NGC 3982, a spiral galaxy in Ursa Major Image Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA); Acknowledgment: A. Riess (STScI) NGC 3982 (also known as UGC 6918) is an intermediate spiral galaxy of some 30,000 light-years across, located approximately 68 million light-years away in the constellation of Ursa Major (the [continue reading]

Did Greenhouse Gases Raise Ancient Martian Temperature?

Did Greenhouse Gases Raise Ancient Martian Temperature?

  Much like the Grand Canyon, Nanedi Valles snakes across the Martian surface suggesting that liquid water once crossed the landscape, according to a team of researchers who believe that molecular hydrogen made it warm enough for water to flow. Split panel comparing (a) a section of Arizona’s Grand Canyon against (b) a section of [continue reading]

Which Ancient Minerals Gave Rise to Life?

Which Ancient Minerals Gave Rise to Life?

  Life originated as a result of natural processes that exploited early Earth’s raw materials. Scientific models of life’s origins almost always look to minerals for such essential tasks as the synthesis of life’s molecular building blocks or the supply of metabolic energy. But this assumes that the mineral species found on Earth today are [continue reading]