โพสต์เมื่อ 21 ก.ค. 2558 | 03:35 น.
นาซา
Explore the universe and discover our home planet with the official NASA Instagram account
ของ NASA
มี 56,029 คนชอบรูปนี้
-
Titan may be a "large" moon - its name even implies it! - but it is still dwarfed by its parent planet, Saturn. As it turns out, this is perfectly normal. Although Titan (3200 miles or 5150 km across) is the second-largest moon in the solar system, Saturn is still much bigger, with a diameter almost 23 times larger than Titan’s. This disparity between planet and moon is the norm in the solar system. Earth’s diameter is “only” 3.7 times our moon’s diameter, making our natural satellite something of an oddity. (Another exception to the rule: dwarf planet Pluto’s diameter is just under two times that of its moon.) So the question isn't why is Titan so small (relatively speaking), but why is Earth’s moon so big? This view looks toward the anti-Saturn hemisphere of Titan. North on Titan is up. The image was taken with the Cassini spacecraft wide-angle camera on April 18, 2015 using a near-infrared spectral filter with a passband centered at 752 nanometers. The view was acquired at a distance of approximately 930,000 miles (1.5 million kilometers) from Titan. Image scale is 56 miles (90 kilometers) per pixel. Credit: NASA/JPL-Caltech/Space Science Institute #Cassini #Saturn #planets #space #solarsystem #titan #moon #nasa; -
Loops in Profile A whole series of loops towered above a group of active regions over a five-days period from July 9-13, 2015. When viewed in extreme ultraviolet light, magnetic field lines above the Sun's surface are revealed by charged particles that spin along the lines and create these loops. They are best observed along the edge of the Sun as they are here. The tallest of the loops reach up about 15 times the diameter of Earth. Image credit: NASA/SDO #nasa #space #sun #solar #sdo #sunloops; -
Portrait of Pluto and its largest moon! The latest two full-frame images of the dwarf planet and its moon were collected separately by New Horizons during approach on July 13 and July 14, 2015. The relative reflectivity, size, separation, and orientations of Pluto and Charon are approximated in this composite image, and they are shown in approximate true color. Image Credit: NASA/JHUAPL/SWRI #nasa #pluto #plutoflyby #newhorizons#solarsystem #charon #moon #nasabeyond #science; -
Although the Quintuplet Cluster gained its name due to its five brightest stars, it is home to hundreds more. The huge number of massive young stars in the cluster is clearly captured in this Hubble Space Telescope image. The cluster is just 100 light-years from the center of our galaxy. The Quintuplet Cluster hosts two extremely rare luminous blue variable stars: the Pistol Star, one of the most luminous known stars in the Milky Way. The exact age and future of the Pistol Star are uncertain, but it is expected to end in a supernova or even a hypernova in one to three million years. The cluster also contains a number of red supergiants, the largest in the galaxy and are burning their fuel at an incredible speed, meaning they will have a very short lifetime. Image credit: ESA/NASA #nasa #space #hubble #hubble25 #astronomy #galaxy #telescope #hst #science; -
Zoom in! New from our New Horizons spacecraft: In the center left of Pluto's vast heart-shaped feature - informally named "Tombaugh Regio" - lies a vast, craterless plain that appears to be no more than 100 million years old, and is possibly still being shaped by geologic processes. This frozen region is north of Pluto's icy mountains and has been informally named Sputnik Planum (Sputnik Plain), after Earth's first artificial satellite. Credit: NASA #nasa #pluto #plutoflyby #newhorizons#solarsystem #nasabeyond #science;
-
Far Side of the Sun: This image of the sun was taken on Wednesday with the Extreme Ultraviolet Imager onboard our Solar TErrestrial RElations Observatory Ahead (STEREO-A) spacecraft, which collects images in several wavelengths of light that are invisible to the human eye. This image shows the sun in wavelengths of 171 angstroms, which are typically colorized in blue. STEREO-A has been on the far side of the sun since March 24, where it had to operate in safe mode, collecting and saving data from its radio instrument. The first images in over three months were received from STEREO-A on July 11. Image Credit: NASA/STEREO #nasa #nasabeyond #sun #heliophysics #stereo #earth #science; -
Remarkable new details of Pluto's largest moon Charon are revealed in this image from our New Horizons spacecraft taken late on Tuesday from a distance of 289,000 miles (466,000 kilometers). A swath of cliffs and troughs stretches about 600 miles (1,000 kilometers) from left to right, suggesting widespread fracturing of Charon's crust, likely a result of internal processes. At upper right, along the moon's curving edge, is a canyon estimated to be 4 to 6 miles (7 to 9 kilometers) deep. Mission scientists are surprised by the apparent lack of craters on Charon. South of the moon's equator, at the bottom of this image, terrain is lit by the slanting rays of the sun, creating shadows that make it easier to distinguish topography. In Charon's north polar region, a dark marking nicknamed 'Mordor' is prominent in the image. Higher resolution images still to come are expected to shed more light on this enigmatic region. New Horizons traveled more than three billion miles over nine-and-a-half years to reach the Pluto system. Image Credit: NASA-JHUAPL-SwRI #nasa #pluto #plutoflyby #newhorizons#solarsystem #nasabeyond #science; -
Mountains on Pluto! This movie zooms into the base of the heart-shaped feature on Pluto to highlight a new image captured by our New Horizons spacecraft. The new image, seen in black and white against a previously released color image of Pluto, shows a mountain range with peaks jutting as high as high as 11,000 feet (3,500 meters) above the surface of the icy body. Image credit: NASA/JHUAPL/SwRI nasa #pluto #plutoflyby #newhorizons#solarsystem #nasabeyond #science; -
You ain't seen nothing yet! Today's image was just the latest in a series of the New Horizons Pluto "picture show." Tomorrow, more images of surface close-ups will make the more than four-hour journey to Earth at the speed of light to give ten times the resolution of what we saw today, with details as small as New York's Central Park. Stay tuned! #PlutoFlyby #NASA #NASANewHorizons @NASASolarSystem #space #pluto #planet; -
SNEAK PEAK of gorgeous Pluto! The dwarf planet has sent a love note back to Earth via our New Horizons spacecraft, which has traveled more than 9 years and 3+ billion miles. This is the last and most detailed image of Pluto sent to Earth before the moment of closest approach - 7:49 a.m. EDT today. This image will be released and discussed at 8 a.m. EDT today. Watch our briefing live on NASA Television at: http://www.nasa.gov/nasatv The high res pic will be posted on the web at: http://www.nasa.gov. This stunning image of the dwarf planet was captured from New Horizons at about 4 p.m. EDT on July 13, about 16 hours before the moment of closest approach. The spacecraft was 476,000 miles (766,000 kilometers) from the surface. Image Credit: NASA #nasa #pluto #plutoflyby #newhorizons #solarsystem #nasabeyond #science;
-
Three billion miles from Earth and just two and a half million miles from Pluto, NASA’s New Horizons spacecraft has taken its best image of four dark spots that continue to captivate. At 7:49 AM EDT on Tuesday, July 14 New Horizons will zip past Pluto at 30,800 miles per hour (49,600 kilometers per hour), with a suite of seven science instruments busily gathering data. The mission will complete the initial reconnaissance of the solar system with the first-ever look at the icy dwarf planet. Credit: NASA #nasa #space #pluto #plutoflyby #nasabeyond #science; -
Stunning Spiral Galaxy! This little-known galaxy is a classic example of a spiral galaxy. The galaxy is much like our own galaxy, the Milky Way. The disk-shaped galaxy is seen face on, revealing the winding structure of the spiral arms. Dark patches in these spiral arms are in fact dust and gas — the raw materials for new stars. The many young stars that form in these regions make the spiral arms appear bright and bluish. Image credit: ESA/Hubble & NASA #nasa #hubble #hubble25 #nasabeyond #space #galaxy #science; -
They're a fascinating pair: Two icy worlds, spinning around their common center of gravity like a pair of figure skaters clasping hands. Scientists believe they were shaped by a cosmic collision billions of years ago, and yet, in many ways, they seem more like strangers than siblings. A high-contrast array of bright and dark features covers Pluto's surface, while on Charon, only a dark polar region interrupts a generally more uniform light gray terrain. The reddish materials that color Pluto are absent on Charon. Pluto has a significant atmosphere; Charon does not. On Pluto, exotic ices like frozen nitrogen, methane, and carbon monoxide have been found, while Charon's surface is made of frozen water and ammonia compounds. The interior of Pluto is mostly rock, while Charon contains equal measures of rock and water ice. On Tuesday, our New Horizons spacecraft will make its closest approach to Pluto. Standby for more never-before seen images of Pluto! Image Credit: NASA #nasa #space #newhorizons #pluto #plutoflyby #charon #nasabeyond #science; -
Flaring, active regions of our sun are highlighted in this new image combining observations from several telescopes. High-energy X-rays from our Nuclear Spectroscopic Telescope Array (NuSTAR) are shown in blue; low-energy X-rays from Japan's Hinode spacecraft are green; and extreme ultraviolet light from our Solar Dynamics Observatory (SDO) is yellow and red. All three telescopes captured their solar images around the same time on April 29, 2015. The NuSTAR image is a mosaic made from combining smaller images. The active regions across the sun's surface contain material heated to several millions of degrees. Image credit: NASA/JPL-Caltech/GSFC/JAXA #nasa #sun #nustar #nasabeyond #hinode #sdo #science; -
Only 8 days until our New Horizons spacecraft flies by Pluto! And new high-resolution views of Pluto were just released! One image includes the four mysterious dark spots on Pluto that have captured the imagination of the world. The Long Range Reconnaissance Imager (LORRI) obtained the images prior to the July 4 anomaly that sent New Horizons into safe mode. This color version of the July 3 LORRI image was created by adding color data from the Ralph instrument gathered earlier in the mission. All images: http://www.nasa.gov/newhorizons Credit: NASA/JHUAPL/SWRI #nasa #pluto #plutoflyby #newhorizons #space #nasabeyond #science;
Instagram is a registered trademark of Instagram, inc.
