Thursday, Oct. 30, 2014: Galaxy NGC 1291, in the constellation of Eridanus, gleams with a ring of young stars circling it. This ring, colored red here,…Read More »
contains new stars igniting and heating up dust that glows with infrared light. In contrast, the stars in the center of the galaxy glow with shorter-wavelength infrared light colored blue. These stars have lived longer, having already consumed fuel for new stars. The galaxy is about 12 billion years old, and is classed as a barred galaxy, having a bar of stars in its center. In young, gas-rich galaxies, stellar bars force gas toward the center, promoting star formation. Over time, as star-making fuel runs out, the central regions quiet down, and star-formation activity migrates to the galaxy’s outskirts. Read the Full Story.
Tuesday, Oct. 28, 2014: A laser beam slices upwards from Unit Telescope 4 of ESO's Very Large Telescope, at Paranal Observatory in Chile. To the left of…Read More »
the beam, the two Magellanic Clouds appear as fuzzy blobs. On the right of the beam, bright star Canopus shines. The laser creates an artificial star about 90 kilometers from the ground, providing a guide for the adaptive optics of the telescope to reduce distortion from water vapor, pollution and turbulence in the Earth’s atmosphere. Image released Oct. 27, 2014.
Monday, Oct. 27, 2014: Astrophotographer Chris Schur sent in a photo of the partial solar eclipse, taken in northern Arizona, on Oct. 23, 2014. He used…Read More »
a calcium filter, which isolates a narrow band of light, showing magnetic features on the sun. He writes in an email message to Space.com: "Finally [I] do not have to deal with our Arizona monsoon any more, [as] the sky cleared out nicely for the morning sunspot shootout and later for the partial eclipse, which [covered] 44 percent [of the sun's disk] here in northern Arizona…. Not too many shots of the partial eclipse will be with calcium filters!"
Very Hot and Very Flat and That Is That in Bonneville
Credit: ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space Center
Thursday, Oct. 23, 2014: Astronauts on the International Space Station (ISS) obtained this photo of the western United States from a point over Nebraska…Read More »
in early October 2014. From left to right along the Earth’s horizon, we see Phoenix, Arizona, then Los Angeles, San Francisco, and finally Portland, Orgeon. The bright area in the foreground represents the Ogden-Salt Lake City-Provo region of Utah with the Bonneville Salt Flats just above. Green airglow appears over the Earth. Moonlight glints from the solar arrays of the ISS in the foreground.
Wednesday, Oct. 22, 2014: Galaxy NGC 4526 shows dark dust lanes and a bright glow that give it the appearance of a halo. NGC 4526 represents one of the…Read More »
brightest lenticular galaxies, a category between spirals and ellipticals. Two known supernova explosions have been sighted in it, during 1969 and 1994. An enormous supermassive black hole lies at its center with the mass of 450 million suns. NGC 4526 is part of the Virgo cluster of galaxies. Image released Oct. 20, 2014.
Tuesday, Oct. 21, 2014: Geologic diversity on Mars is shown in this image of the eastern Elysium Planitia region. Abutting this field is a mesa, which…Read More »
displays dark streaks on its slopes. Perhaps these streaks are caused by freshly disturbed darker material that hasn’t faded yet. Dust avalanches like these commonly occur in dust-covered Martian regions. Further south, a line of pits and also fretted terrain are visible, then a network of channels and depressions dominating the southern part of the image. The photo, taken by NASA's Mars Reconnaissance Orbiter, was released on Oct. 15, 2014.
Friday, Oct. 17, 2014: Saturn’s moon Tethys appears as if impaled on the A and F rings in this photo by Cassini spacecraft. Tethys (660 miles, or 1,062…Read More »
kilometers across) consists, similar to the ring particles, primarily of ice. The moon appears through the Keeler gap in the A ring, kept clear by the small moon Daphnis (not pictured). Cassini spacecraft obtained the image in visible light on July 14, 2014.
Thursday, Oct. 16, 2014: Astrophotgrapher BG Boyd of Tucson, Arizona, sent in a photo of a Draconid meteor next to the Milky Way, taken on Oct. 10, 2014,…Read More »
on Douglas Springs Trail. He writes in an email message to Space.com: “I went out pretty early (45 minutes after sunset) on the evening of the 10th to see if I could catch any meteors before the waning gibbous moon rose into the sky. I was lucky enough to see several, and actually captured this one just to the left of the Milky Way.”
Credit: ESA/Hubble & NASA ; Acknowledgement: Josh Barringto
Wednesday, Oct. 15, 2014: This image by Hubble Space Telescope depicts a portion of the Large Magellanic Cloud (LMC), a small nearby galaxy orbiting our…Read More »
galaxy, the Milky Way. Specifically, in this photo we see the Tarantula Nebula's outlying areas. A filter passing near-infrared light causes this image to appear quite different than most photos of the LMC. Usually an R filter passes red light highlighting hydrogen gas, but here other emission lines glow with blue and green hues. Image released Oct. 13, 2014.
Tuesday, Oct. 14, 2014: NASA astronaut Reid Wiseman (bottom) performed the first of three spacewalks for the Expedition 41 crew aboard the International…Read More »
Space Station on Oct. 7, 2014. European Space Agency astronaut Alexander Gerst (not pictured) also took part in the spacewalk. The spacewalkers toiled outside the space station's Quest airlock, relocating a failed cooling pump to external stowage. They also installed gear that provides back-up power to external robotics equipment. The spacewalk lasted 6 hours, 13 minutes.
Monday, Oct. 13, 2014: STEREO (Behind) spacecraft obtained this image of a large prominence and coronal mass ejection as they erupted into space from the…Read More »
sun (Sept. 26, 2014). Scientists combined images from three instruments in order to see the eruption itself (in extreme UV light), as well as following its development over a period of about 13 hours with two coronagraphs.
Friday, Oct. 10, 2014: The central part of the Rosette Nebula (NGC 2239) appears in this large-scale view obtained by the Canada-France-Hawaii Telescope…Read More »
located atop the summit of Mauna Kea on the island of Hawaii. The nebula consists of a cloud of glowing gas heated by stars which formed only a few million years ago in the collapse of a giant molecular cloud. The hot, newly born stars in this center ionize the ambient hydrogen gas, causing it to emit red light, an indicator of star formation in galaxies.
Credit: ESA/Hubble & NASA; Acknowledgement: Nick Rose
Thursday, Oct. 9, 2014: Spiral galaxy NGC 4206 lies roughly 70 million light-years away from Earth in the constellation of Virgo. This new Hubble Space…Read More »
Telescope shows the galaxy as it appears to us, edge-on. Streaks of dust partly obscure the central bulge. On the edges of the galaxy, scattered bluish clumps indicate areas where stars form. The bulge consists mainly of older, redder stars, and very little star formation takes place there. Researchers imaged NGC 4206 as part of a Hubble snapshot survey of nearby edge-on spiral galaxies to explore the effect that the material between the stars, the interstellar medium, has on light travelling through. Image released Oct. 6, 2014.
Wednesday, Oct. 8, 2014: Astrophotographer Caroline Angelo sent in a photo of the Oct. 8, 2014, lunar eclipse as seen from the east side of the U.S. Capitol in Washington, DC.
— Tom Chao
18 of 23
The Way That Gravity Pulls on You and Me
Credit: NASA/Colorado School of Mines/MIT/GSFC/Scientific Visualization Studio
Tuesday, Oct. 7, 2014: The Lunar Orbiter Laser Altimeter, aboard NASA's Lunar Reconnaissance Orbiter, collected data to produce this image showing the…Read More »
topography of Earth’s moon. Gravity anomalies bordering the Procellarum region appear superimposed in blue. The image depicts border structures using gravity gradients calculated with information obtained by NASA's Gravity Recovery and Interior Laboratory (GRAIL) mission. Researchers interpret these gravity anomalies as ancient lava-flooded rift zones buried beneath the volcanic plains (or maria) on the nearside of the moon. Image released October 1, 2014.
Monday, Oct. 6, 2014: Astrophotographer James L. Jenkins Jr. sent in a photo of the Milky Way over Bodie Light on North Carolina's Hatteras National Seashore.…Read More »
He writes: “This image of Bodie Light is from a single frame taken on July 17, 2014, during a rare break in summertime haze and humidity. The lighthouse was not lit that evening and the moon was below the horizon granting me unlimited exposure time to capture the dark sky's natural light. This photograph is a single exposure .... Light balance was minimally enhanced using Photoshop Elements.”
Friday, Oct. 3, 2014: NASA's Solar Dynamics Observatory caught this image of a mid-level solar flare, M5.1 class, erupting from the sun on Sept. 27, 2014.…Read More »
Solar flares arise when the sun emits powerful bursts of radiation. Radiation from a flare cannot pass through Earth's atmosphere to harm humans on the ground. However intense flares can disturb the atmosphere in the layer where GPS and communications signals travel, disrupting telecommunications systems.
Thursday, Oct. 2, 2014: Star AG Carinae (HD 94910) shines in this new image by Hubble Space Telescope. The star lies 20,000 light-years away, a member…Read More »
of the Milky Way, lying in the constellation of Carina in the southern sky. Researchers consider AG Carinae a Luminous Blue Variable, a massive evolved star that will one day become a Wolf-Rayet Star, tens of thousands to several million times as luminous as our sun. Stars similar to AG Carinae lose mass at an extremely rapid rate, blowing off mass in powerful stellar winds that blast up to 4.3 million miles/hour (7 million km/hour). HD 94910 cannot be seen with the naked eye as much of its output is in the ultraviolet.
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington
Wednesday, Oct. 1, 2014: Large, degraded crater Li Po on Mercury appears in the lower half of this image obtained by MESSENGER spacecraft on October 29,…Read More »
2011. Li Po (701-762), a Chinese poet of the Tang Dynasty, was known for poems about friendship, nature, and wine. One of his best-known poems is called, "A Quiet Night Thought." Image released Sept. 29, 2014.