Pre-Winter Storm, Southwestern Australia In 2014

The Pillars of Creation and Spotting Comet Lovejoy

This week in space news, a new makeover for one of the Hubble Telescope’s most famous images, and tips on spotting Comet Lovejoy in the night sky.

The sprawling Caloris basin on Mercury is one of the solar system’s largest impact basins, created during the early history of the solar system by the impact of a large asteroid-sized body. The multi-featured, fractured basin spans about 1,500 kilometers in this enhanced color mosaic based on image data from the Mercury-orbiting MESSENGER spacecraft. Mercury’s youngest large impact basin, Caloris was subsequently filled in by lavas that appear orange in the mosaic. Craters made after the flooding have excavated material from beneath the surface lavas. Seen as contrasting blue hues, they likely offer a glimpse of the original basin floor material. Analysis of these craters suggests the thickness of the covering volcanic lava to be 2.5-3.5 kilometers. Orange splotches around the basin’s perimeter are thought to be volcanic vents.

Image Credit: NASA, Johns Hopkins Univ. APL, Arizona State U., CIW

Comets may hold the secret to the origin of life on Earth

We’ve studied life on Earth extensively, but we still have no idea where it came from. Some scientists think it may have spontaneously arisen on Earth by some unknown process. Others think the ingredients for life were delivered here by comets crashing into Earth in the early days of the solar system. The latter theory just got a huge boost.

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Comet shapes and characteristics from a Chinese silk book (Boshu) written during the Han dynasty (206 BC-22 AD)

Hubble has been 27 years in space, being launched in April 24, 1990. The first image it shoot was the star cluster NGC 3532.

NASA’s Cassini spacecraft shows Earth and its moon from between Saturn’s rings

NASA’s Cassini spacecraft, which orbits Saturn, took a picture of Earth from between Saturn’s rings — with Earth’s moon at its side.

Captured at 1:41 a.m. Eastern on April 12, 2017, the spacecraft was 870 million miles away from its home planet when it took the image.

Earth is seen as a tiny bright speck in the center of the picture. Upon cropping and zooming in, its moon can be seen to the left as an even smaller dot. The photograph, captured by the Imaging Science Subsystem, doesn’t clearly show which part of Earth is facing the ringed planet at the time the picture was taken, but NASA has revealed it is the southern Atlantic Ocean. Read more (4/21/17)

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Johannes Hevelius, Cometographia (Danzig, 1668), Fig. L

http://player.vimeo.com/video/62255585

Comet Panstarrs captured in gorgeous time-lapse above the skies of Boulder, CO by Patrick Cullis. Lovely stuff.

Comets are mysterious frozen chunks of stellar and planetary debris, these dirty snowballs that wander in darkness until their tails are blown bright and wide by solar winds. Some follow paths so random and eccentric that they may pass a star only once, or perhaps not at all, instead floating through interstellar space, never to be known. But for those fleeting moments, like Panstarrs’ current passage, they are like icy candles lit for our enjoyment by the breath of the sun.

A song of ice and fire, indeed.