The First Art Newspaper on the Net   Established in 1996 United States Thursday, July 28, 2016


Comet surface is dark and crusty, unmanned spacecraft Rosetta suggests
The nucleus of Rosetta's target comet 67P/Churyumov–Gerasimenko seen from a distance of 1950 km on July 29, 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. Rosetta arrives at the comet at an altitude of 100 km in the first week of August, and will move progressively closer over the following two months, with the intention to orbit at an altitude of just 10 km, depending on the comet’s activity. For Philae’s deployment in November, Rosetta will come to within a few kilometres of the surface. AFP PHOTO / ESA.
PARIS (AFP).- A European probe approaching a comet in deep space has found the body's surface to be relatively warm, suggesting it has a mostly "dark, dusty crust," mission controllers said Friday.

Thermal readings were taken by the unmanned spacecraft Rosetta as it neared Comet 67P/Churyumov-Gerasimenko on the final leg of a six-billion-kilometre (3.75-billion-mile), 10-year pursuit.

Using an infrared spectrometer, Rosetta scanned the comet between July 13 and 21, when the distance between them closed from 14,000 kilometres (8,750 miles) to just over 5,000 kilometres, the European Space Agency (ESA) said.

At the time, the comet was about 555 million kilometres from the Sun.

Its average temperature was minus 70 degrees Celsius (minus 94 degrees Fahrenheit), the measurements found.

This may sound bitterly cold, but is in fact 20-30 degrees Celsius warmer than would have been expected if the comet had an ice-only surface, said an ESA statement.

"The temperature measurements provide direct confirmation that much of the surface must be dusty, because darker material heats up and emits heat more readily than ice when it is exposed to sunlight," it said.

Comets are believed by astrophysicists to be relics left from the building of the Solar System around 4.6 billion years ago.

Famously dubbed "dirty snowballs" by the late US astronomer Fred Whipple, they are theorised to be clusters of primeval ice and dust.

The 1.3-billion-euro ($1.8-billion) Rosetta mission aims to pierce the secrets of these wanderers, to explain their composition and the chemistry of their ancient molecules.

Launched in 2004, Rosetta should come within 100 kilometres of the comet next Wednesday.

It has spent much of the last 10 years shuttling between Earth and Mars, using the planets' gravitational force as a slingshot to build up speed for the rendezvous.

The highlight of the mission will come in November, when Rosetta drops a refrigerator-sized lab, Philae, on to the comet's surface.

Philae is designed to last for six months, but the mother ship will stay close by, orbiting around the comet as it zips around the Sun and then heads out towards the orbit of Jupiter in 2015.

The spacecraft is named after the famous stone, now in the British Museum, that explained Egyptian hieroglyphics, while Philae is named after an obelisk that in turn helped decipher the Rosetta stone.


© 1994-2014 Agence France-Presse






Today's News

August 3, 2014

Museum of Human Evolution in Spain presents a sculpture representing Homo Antecessor

Comet surface is dark and crusty, unmanned spacecraft Rosetta suggests

No show for North Korean defector artist Sun Mu at Yuan Dian gallery in China

Remembering World War I: Russian tsar Nicholas II's reluctant march to war

At $100 million Skywalker Ranch in California, the 'Force' of George Lucas is everywhere

Muhammad Ali fight-worn gloves from 1971 'Fight of The Century' against Frazier bring $388,375 at auction

Tate announces new online performance for this autumn's BMW Tate Live Performance Room

Tacoma Art Museum announces Samantha Hightower as Director of Education

abc art berlin contemporary 2014, to be held at at Station at Gleisdreieck, announces artists

New York Print Week rolls out full schedule of museum shows, gallery exhibitions and satellite fairs

The Jewish Museum launches new website designed by Sagmeister & Walsh

Rarities from more than 50 countries offered in Heritage's ANA World & Ancient Coins Platinum Night Auction

Altria Group donates $1 million to the Smithsonian's National Museum of African American History and Culture

Over $14million falls back to Queensland from Cai Guo-Qiang exhibition

Paramount apologises after Ninja Turtles poster recalls 9/11

PIASA announces inaugural Arts & Crafts Sale

University of Texas Press announces publication of Bronx Boys by Stephen Shames

Jerwood Drawing Prize 2014 selection announced

Monochromart: A new group show opens aat LAUNCH LA

Mississippi Museum of Art announces artists for 2014 Mississippi Invitational Exhibition

Groundbreaking survey from 1960s to present opens at the Walker Art Center

Saint Louis Art Museum presents 'Janaina Tschäpe: The Ocean Within'

Most Popular Last Seven Days



1.- 100 nude women pose in Cleveland, reflecting on Trump

2.- West Kowloon Cultural District Authority appoints M+ Executive Director

3.- Hieronymus Bosch, Touched by the Devil: Movie has US premiere at Film Forum

4.- Masterpieces replaced by fakes in six national galleries in treasure hunt

5.- On the Verge of Insanity: Van Gogh 'suicide gun' on display in Amsterdam

6.- Getty Museum opens exhibition of illuminated manuscripts

7.- Two rolls of early Kodak film acquired by the George Eastman Museum

8.- Dark secrets of the man who opened architecture to the light

9.- Chinese artist Ai Weiwei's refugee life jackets in Vienna palace pond

10.- Gallery 19C brings together two views of Venice by Jean-Baptiste-Camille Corot



Museums, Exhibits, Artists, Milestones, Digital Art, Architecture, Photography,
Photographers, Special Photos, Special Reports, Featured Stories, Auctions, Art Fairs,
Anecdotes, Art Quiz, Education, Mythology, 3D Images, Last Week, .

 

Founder:
Ignacio Villarreal
Editor & Publisher:Jose Villarreal - Consultant: Ignacio Villarreal Jr.
Art Director: Juan José Sepúlveda Ramírez

Royalville Communications, Inc
produces:

ignaciovillarreal.org theavemariasound.org juncodelavega.org facundocabral-elfinal.org
Founder's Site. The most varied versions
of this beautiful prayer.
Hommage
to a Mexican poet.
Hommage
       

The First Art Newspaper on the Net. The Best Versions Of Ave Maria Song Junco de la Vega Site Ignacio Villarreal Site
Tell a Friend
Dear User, please complete the form below in order to recommend the Artdaily newsletter to someone you know.
Please complete all fields marked *.
Sending Mail
Sending Successful