• The Assistant's Assistant

    A section of the Bayeux tapestry featuring Halley's comet

  • Naomi Suniga

    Halley's Comet on the Bayeux Tapestry. ©Mona Evans "Halley's Comet" Was Spotted By The Ancient Greeks |TUESDAY, SEPTEMBER 14, 2010|A celestial event seen by the ancient Greeks may be the earliest sighting of Halley's comet, new evidence suggests. According to ancient writers, a large meteorite smacked into northern Greece between 466BC and 467BC. | http://www.bellaonline.com/articles/art44795.asp

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Imhotep region on Comet 67P/Churyumov–Gerasimenko - geological mapping. (Image credit: ESA/ Rosetta/ MPS for OSIRIS Team MPS/ UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA) Mona Evans, "Rosetta the Comet Chaser" Mona Evans, "Rosetta - the Comet Chaser) www.bellaonline.c...

Imhotep region on Comet 67P/Churyumov–Gerasimenko – mosaic of six camera images of the geologically diverse region. The images were taken from different distances, so the scale varies. (Credit: ESA/ Rosetta/ MPS for OSIRIS Team MPS/ UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA) Mona Evans, "Rosetta - the Comet Chaser) www.bellaonline.c...

Comet 67P/Churyumov-Gerasimenko on 20 May 2015 – taken by Rosetta's NavCam. (Copyright: ESA/Rosetta/NavCam) Rosetta was 163.6 km (100 miles) from the comet centre. Mona Evans, "Rosetta the Comet Chaser" www.bellaonline.c...

Comet P/Shoemaker-Levy 9, taken on May 17, 1994, with the Hubble Wide Field Planetary Camera-2 (WFPC-2). The comet's train of 21 icy fragments stretched across 710 thousand miles (1.1 million km) of space. In mid-July the fragmented comet collided with Jupiter. (Credit: H.A. Weaver, T. E. Smith (Space Telescope Science Institute), and NASA)

In reality, as other astronomers were quick to point out, the gas was so diffuse that the world suffered no ill effects from the passage through the tail. After Halley’s passed by the Earth on this day in May, the Chicago Tribune announced (unnecessarily) “We’re Still Here.”

Comet 2014 Q2 (Lovejoy), on December 27, 2014, as seen by the Dark Energy Survey. (Credit: Fermilab’s Marty Murphy, Nikolay Kuropatkin, Huan Lin and Brian Yanny.) The comet just happened to come into the field of view of the 570-megapixel Dark Energy Camera, the world’s most powerful digital camera.This is a composite image put together from 62 images taken by the camera's CCDa.

Can you see the comet? Four solar system objects adjusted for true brightness counterclockwise from the upper right: Earth, Enceladus, the Moon, and Comet 67/P. Credit: ESA/Rosetta Blog/NASA/JPL/Space Science Institute (Enceladus); ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/ UPM/DASP/IDA and Gordan Ugarkovich (Earth); Robert Vanderbei, Princeton University (Moon); ESA/Rosetta/NAVCAM (67P/C-G).

High resolution 3 panel mosaic of Comet Lovejoy on January 11, 2015. Field of view is approximately 3.5° x 2° and composed of three fields. Many fine streamers are visible emanating from the nucleus. (Credit & copyright: SEN/ Damian Peach)

Comet Lovejoy C/2104 Q2 cruising past the open star Cluster M45 “Pleiades” or “The Seven Sisters.” Credit and copyright: John Chumack.

Finder chart for Comet Lovejoy, C/2014 Q2, during January 2015. The dates are in Universal Time; the ticks are at 0:00 UT (7 p.m. on the previous date Eastern Standard Time).

Comet Lovejoy, December 16, 2014. C/2014 Q2 is framed like a cosmic Christmas tree with starry decorations in this colorful portrait. Its lovely coma is tinted green by diatomic C2 gas fluorescing in sunlight. A long period comet, this Comet Lovejoy should return again ... in about 8,000 years. (Image Credit & Copyright: Damian Peach/SEN)

Colour image of Comet 67P/Churyumov-Gerasimenko, made using three color filters on 6 August 2014 from a distance of 120 kilometres. The image covers roughly 4 x 4 km at a resolution of about 3.9 metres per pixel. (Credits: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA) Not surprisingly, to me it looks pretty much the same color as it did in black & white! Mona Evans, "Rosetta the Comet Chasers" www.bellaonline.c...

Image shows size of Philae's comet by setting It down on London. You can see it atop Amsterdam, Paris, Rome, Madrid and Darmstadt. Just click on the picture to get the original article. Darmstadt? It's not Germany's capital, but it is the location of the European Space Operations Centre.

Small Bodies. Comparison between Rosetta's Comet Churyumov-Gerasimenko and various other objects real and imagined. (Credit: Judy Schmidt)

Comet C/2013 A1 Siding Spring After The Encounter With Mars Comet C/2013 (Credit: Rolando Ligustri on October 20, 2014 @ from Australia)

Comet 2013 A1 Siding Spring on October 17, 2014, with two days to go until its Martian encounter. Very dense Milkyway starfield in the background with many darker obscured regions. Credit and copyright: Damian Peach/SEN.

Comet C/2013 A1 Siding Spring seen on 6 September 2014 from Argentina. (Image credit: César Nicolás Fornari)

The nucleus of Rosetta's target comet seen from a distance of 1950 km on 29 July 2014. One pixel corresponds to about 37 m in this narrow-angle camera view. The bright neck between the two lobes of the nucleus is becoming more and more distinct. (Credits: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA) Mona Evans, "Rosetta the Comet Chasers" www.bellaonline.c...

Cloud, Clusters & Comet Siding Spring. [Image Rolando Ligustri (CARA Project, CAST)] It was discovered in January 2013 by Robert McNaught at Australia's Siding Spring Observatory. This photo from August 29 shows the comet's coma and arcing dust tail. The view includes the Small Magellanic Cloud and globular star clusters 47 Tucanae (right) and NGC 362 (upper left). Mona Evans, "Comets" www.bellaonline.c...

Rosetta and Philae - infographic. (Credit: European Space Agency) Mona Evans, "Rosetta the Comet Chaser" www.bellaonline.c...

In case you have been scoffing at the size of tiny comet Churymov-Gerasimenko (AKA the rubber ducky comet) that spacecraft Rosetta has been exploring, here's an image that shows it on the same scale as downtown Los Angles. (Michel, AKA @quark1972 on Twitter.) Mona Evans, "Rosetta the Comet Chaser" www.bellaonline.c...

Comet Lovejoy (C/2011 W3). Photographed from the International Space Station on 2011-12-22. (Credit: NASA / astronaut Dan Burbank) Mona Evans, "Comets" www.bellaonline.c...

Comet 67P/Churyumov-Gerasimenko, taken on 2014-08-09. (Copyright ESA/Rosetta/NAVCAM) This picture was taken at a distance of just under 100 km. Mona Evans, "Rosetta the Comet Chaser" www.bellaonline.c...

ESA’s Rosetta Spacecraft on final approach to Comet 67P/Churyumov-Gerasimenko in early August 2014. This collage of navcam imagery from Rosetta was taken on Aug. 1, 2 and 3 from distances of 1026 km, 500 km and 300 km. Not to scale. (Credit: ESA/Rosetta/NAVCAM Collage/Processing: Ken Kremer/Marco Di Lorenzo) Mona Evans, "Rosetta the Comet Chasers" www.bellaonline.c...

The Rosetta spacecraft saw its destination (Comet 67P/Churymov-Gerasimenko) on March 20, 2014 from about three million miles (five million kilometers) away. The comet is in the small circle next to the globular star cluster M107. (credit: ESA/MPS for OSIRIS-Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DASP/IDA) Mona Evans, "Rosetta the Comet Chaser" www.bellaonline.c...