El entorno de Orión

El entorno de Orión

Gaia ya se encuentra en la Guayana Francesa

Gaia ya se encuentra en la Guayana Francesa

"POTENTIALLY HAZARDOUS NEAR-EARTH OBJECT 1998 KN3"

FROM:  NASA 

This image shows the potentially hazardous near-Earth object 1998 KN3 as it zips past a cloud of dense gas and dust near the Orion nebula. NEOWISE, the asteroid-hunting portion of the Wide-field Infrared Survey Explorer, or WISE, mission, snapped infrared pictures of the asteroid, seen as the yellow-green dot at upper left. Because asteroids are warmed by the sun to roughly room temperature, they glow brightly at the infrared wavelengths used by WISE. Astronomers use infrared light from asteroids to measure their sizes, and when combined with visible-light observations, they can also measure the reflectivity of their surfaces. The WISE infrared data reveal that this asteroid is about .7 mile (1.1 kilometers) in diameter and reflects only about 7 percent of the visible light that falls on its surface, which means it is relatively dark. In this image, blue denotes shorter infrared wavelengths, and red, longer. Hotter objects emit shorter-wavelength light, so they appear blue. The blue stars, for example, have temperatures of thousands of degrees. The coolest gas and dust appears red. The asteroid appears yellow in the image because it is about room temperature: cooler than the distant stars, but warmer than the dust. JPL manages the Wide-field Infrared Survey Explorer for NASA's Science Mission Directorate, Washington. The principal investigator, Edward Wright, is at UCLA. The mission was competitively selected under NASA's Explorers Program managed by the Goddard Space Flight Center, Greenbelt, Md. The science instrument was built by the Space Dynamics Laboratory, Logan, Utah, and the spacecraft was built by Ball Aerospace & Technologies Corp., Boulder, Colo. Science operations and data processing take place at the Infrared Processing and Analysis Center at the California Institute of Technology in Pasadena. Caltech manages JPL for NASA. Image Credit: NASA/JPL-Caltech

ESA Week in Images

Week in Images

Richtfest ESOC II - "Europas Tor zum Weltraum in Südhessen" erschließt neues Terrain

Richtfest ESOC II - "Europas Tor zum Weltraum in Südhessen" erschließt neues Terrain

Convite à imprensa: Não perca a maior conferência científica da ESA, sobre o clima e o ambiente terrestres

Convite à imprensa: Não perca a maior conferência científica da ESA, sobre o clima e o ambiente terrestres

Un sans-faute du lancement d’Alphasat, le plus grand et le plus sophistiqué des satellites de télécommunications européens

Un sans-faute du lancement d’Alphasat, le plus grand et le plus sophistiqué des satellites de télécommunications européens

Galileo déploie ses ailes

Galileo déploie ses ailes

TESTING BEFORE TELESCOPE'S ASSEMBLY

PHOTO:  A crane in a clean room at NASA's Goddard Space Flight Center in Greenbelt, Md., lowers a test mass simulator (center of frame) onto the Ambient Optical Assembly Stand or AOAS to ensure it can support the James Webb Space Telescope's Optical Telescope Element during its assembly.  Image Credit: NASA/Chris Gunn

FROM:  NASA 

Dropping in on a James Webb Space Telescope Clean Room Test
The James Webb Space Telescope is a large space telescope, optimized for infrared wavelengths. It is scheduled for launch later in this decade. Webb will find the first galaxies that formed in the early Universe, connecting the Big Bang to our own Milky Way galaxy. Webb will peer through dusty clouds to see stars forming planetary systems, connecting the Milky Way to our own solar system. Webb's instruments will be designed to work primarily in the infrared range of the electromagnetic spectrum, with some capability in the visible range.

Webb will have a large mirror, 6.5 meters (21.3 feet) in diameter, and a sunshield the size of a tennis court. The mirror and sunshade won't fit into a rocket fully open, so both will be folded and open once Webb is in outer space. Webb will reside in an orbit about 1.5 million km (1 million miles) from Earth at the second Lagrange point.

The James Webb Space Telescope was named after a former NASA administrator.

WEEK IN IMAGES

Week in Images

U.S. Department of Defense Armed with Science Update

U.S. Department of Defense Armed with Science Update

Explorando o subsolo marciano

Explorando o subsolo marciano

Družice Alphasat rozevřela svoji obří parabolu

Družice Alphasat rozevřela svoji obří parabolu

U.S. Department of Defense Armed with Science Update: The Cosmic Wheel

U.S. Department of Defense Armed with Science Update

Sun, Moon, and Two Planets Rising Over Earth’s Limb : Earth Matters

Sun, Moon, and Two Planets Rising Over Earth’s Limb : Earth Matters