Dazzling isn’t it? If the name AG Carinae rings a bell, it could be because of this famous star: Eta Carinae.
Thanks to: ESA/Hubble & NASA
This luminous star, AG Carinae, is losing mass at a phenomenal rate. Its powerful winds reach up to seven million km/hour, and exert enormous pressure on the clouds of material already expelled by the star.
These incredible winds have already cleared a region immediately around the star, and sculpted the material further away into the pattern observed in this Hubble Space Telescope image.
AG Carinae is a rare breed of Luminous Blue Variable star that evolved from a star around 50 times the mass of our Sun. They show variable and unpredictable behaviour, experiencing periods of quiescence and outbursts alike. They are also some of the most luminous stars known: tens of thousands to several million times as luminous as the Sun.
It is worth noting that the bright glare at the centre of the image is not the star itself, which is tiny at this scale and hidden within the saturated region. The white cross is also not an astronomical phenomenon but rather an effect of the telescope.
AG Carinae lies 20 000 light-years away in the constellation of Carina. The image was taken with the Hubble’s Wide Field and Planetary Camera 2, and was first released in September 2014.
A NASA replay of the launch and mostly correct spelling today even with my dogs help.
I watched a post launch news conference and it seems all is well.
A bit of trivia: Recently I have been listening to an audio course concerning the “Physics of Time” and naturally the speed of light is a part of all that. Well during the launch I noticed that after just over a minute the Falcon 9’s Merlin engines propelled the Dragon to around one-millionth the speed of light (c). Orbital velocity is around c* 0.000025. Not exact? I know, do the math it’s fun!
BEAUTIFUL LAUNCH! The landing of the first stage on solid ground was a success and fun to watch. Ok pretty much everything was fun to watch.
I’ll leave the “live feed” up for replays they are sure to run and will post a YouTube version when it is available.
Speaking of YouTube, the live feed for YouTube and the Ustream versions differ slightly. I watched the UStream version on the computer and the YouTube version on the television. The UStream lagged about 20 seconds behind the YT version. If you can get YT on your television watch the replays when available – wow.
Here is a description from Zooniverse I got in an email:
In this project you’ll be searching through images from NASA’s Wide-field Infrared Survey Explorer (WISE) mission, hunting for objects such as brown dwarfs and low-mass stars in our Solar System’s neighbourhood. You may find an object closer than Proxima Centauri (the closest star to the Sun) or even discover the Sun’s hypothesized ninth planet, which models suggest might appear in these images!
Daphnis making waves in the rings of Saturn, yes we saw this image a little while ago, NASA added more images to show more of the waves caused the gravity of the moon – a lot more.
Daphnis, one of Saturn’s ring-embedded moons, is featured in this view, kicking up waves as it orbits within the Keeler gap. The mosaic combines several images to show more waves in the gap edges than seen in a previously released image, PIA21056.
Daphnis is a small moon at 5 miles (8 kilometers) across, but its gravity is powerful enough to disrupt the tiny particles of the A ring that form the Keeler gap’s edge. As the moon moves through the Keeler gap, wave-like features are created in both the horizontal and vertical plane. For more about these vertical structures see PIA11654 and PIA11547.
Images like this provide scientists with a close-up view of the complicated interactions between a moon and the rings, as well as the interactions between the ring particles themselves, in the wake of the moon’s passage. Three wave crests of diminishing sizes trail Daphnis here. In each subsequent crest, the shape of the wave evolves, as the ring particles within the crests collide with one another.
Close examination of Daphnis’ immediate vicinity also reveals a faint, thin strand of ring material that almost appears to have been directly ripped out of the A ring by Daphnis.
The images in this mosaic were taken in visible light, using the Cassini spacecraft narrow-angle camera at a distance of approximately 17,000 miles (28,000 kilometers) from Daphnis and at a Sun-Daphnis-spacecraft, or phase, angle of 71 degrees. Image scale is 551 feet (168 meters) per pixel.
This composite of 11 images of asteroid 2017 BQ6 was generated with radar data collected using NASA’s Goldstone Solar System Radar in California’s Mojave Desert on Feb. 5, 2017, between 5:24 and 5:52 p.m. PST (8:24 to 8:52 p.m. EST / 1:24 to 1:52 UTC). The images have resolutions as fine as 12 feet (3.75 meters) per pixel. – NASA
This newly discovered asteroid passed 6.57 lunar distances from Earth at 06:35 UTC a couple days after this image was acquired. The asteroid has a diameter of 177 meters / 581 feet and will pass again in 2036 (but not quite as close).