It’s official – NASA’s Dawn spacecraft has arrived at the dwarf planet Ceres! Today, March 6 2015, at 7:39 a.m. EST (12:39 UTC) Dawn was captured by Ceres’ gravity at a distance of 38,000 miles (61,155 km). Mission controllers at JPL received a signal from the spacecraft at 8:36 a.m. EST (13:36 UTC) that Dawn was healthy and thrusting with its ion engine, indicating Dawn had entered orbit as planned.
Over the next several weeks Dawn will move into a lower orbit around Ceres, making observations along the way.
Dawn is the first spacecraft to successfully enter orbit around two worlds* and the first to orbit a dwarf planet. Its first target was the asteroid Vesta, which it orbited from July 2011 to September 2012. Now at Ceres two and a half years later, it will remain in orbit both during its primary science phase and beyond… Ceres will be Dawn’s permanent home.
“Since its discovery in 1801, Ceres was known as a planet, then an asteroid and later a dwarf planet. Now, after a journey of 3.1 billion miles and 7.5 years, Dawn calls Ceres home.”
– Marc Rayman, Mission Director and Dawn chief engineer
Congratulations Dawn and the mission team! Follow the Dawn mission news here (and of course right here on Lights in the Dark!)
*The two worlds, Vesta and Ceres, are separate targeted worlds of a science mission. This does not include time spent orbiting Earth, for this mission or others, prior to departure burn.
NASA’s Dawn spacecraft is just a few days away from getting snagged by the pull of Ceres, a dwarf planet existing amongst the asteroids. As it’s approaching via the slow but steady thrust of its ion engines Dawn is getting better and better images of Ceres, bringing the world’s features into focus. But on Friday, March 6 (at 7:20 a.m. EST / 12:20 UTC) it will finally feel the gentle tug of Ceres’ gravity and will soon become the first spacecraft to enter orbit around two different targets.
“Dawn is about to make history,” said Robert Mase, project manager for the Dawn mission at NASA’s Jet Propulsion Laboratory in Pasadena, California. “Our team is ready and eager to find out what Ceres has in store for us.”
One of the biggest mysteries that has arisen during Dawn’s approach to Ceres is the true identity of the two bright spots located within a crater on its northern hemisphere. Shining like the eyes of some nocturnal creature, the bright region was first seen in Hubble images captured in December 2003. Now Dawn has gotten close enough to resolve it into two separate spots, one brighter than the other… but not much more is known about its true nature yet. Read the rest of this entry
Do you have any of those paper 3D viewers around? You know, with the red and blue lenses? If so, pop ‘em on and check out the image above from NASA’s Lunar Reconnaissance Orbiter Camera (LROC) showing the crater “Hell Q,” located on the Moon’s southern near side near the brightly-rayed Tycho. You might think a crater was just carved into your screen!
The 3.75-km-wide Hell Q is one of a cluster of 19 craters located around the main 32.5-km Hell crater. (And no, it wasn’t named after a realm of the afterworld but rather for Hungarian astronomer Maximillian Hell.)
The image was acquired on April 11, 2014. You can see a larger 3D view of the region around Hell Q below.
Former NASA astronaut Ron Garan was recently interviewed for Huffington Post’s LIVE broadcast. Ron talked about his new book The Orbital Perspective (read my review here) along with what it was like to be an astronaut and the way his experiences changed his views of life on Earth. (He also live-narrated some of the work being done at the time of the interview outside the ISS during EVA 30!)
In addition to talking about astronaut stuff, Ron weighed in on the human exploration of Mars, recently brought into the spotlight – for better or worse – with the announcement of 100 finalists by the Dutch MarsOne company, which has aspirations of creating the first human colony on the Red Planet. Ron says that while it will be important for us to venture out into the Solar System, really the next logical step would be to establish a permanent presence on our own Moon first.
“This is our closest neighbor, it’s three days away… There are so many things that could be done on the Moon that would have tremendous benefit.”
– Ron Garan, NASA astronaut
You can watch the entire video here, and share what you think in the poll below – should we go back to the Moon first? Or head right on out to Mars?
Here’s your weekly Ceres update! The dwarf planet’s features are coming into better and better focus for the approaching Dawn spacecraft, which will be captured by Ceres’ gravity on March 6. The image above is yet another “best-ever” of Ceres (as will be each one we see now), captured on Feb. 19, 2015, from a distance of about 29,000 miles (46,000 km).
This was one of a trio of images from Dawn released today. The others can be seen below, including one that shows the intriguing bright spot that has been observed for over a decade.
If you’re in love with space exploration then you’ll fall for this: it’s the picture of Earth taken from the Voyager 1 spacecraft after it passed the orbit of Pluto in 1990. That image of our planet from almost 4 billion miles away inspired Carl Sagan to write his famous “Pale Blue Dot” passage, and reminds us that we are all just floating on “a mote of dust suspended in a sunbeam.”
This is from a post I originally published in 2010. I’ll keep trotting it out until it’s not cool anymore. (Which I don’t think will ever happen.)
On February 14, 1990, after nearly 13 years of traveling the solar system, the Voyager 1 spacecraft passed the orbit of Pluto and turned its camera around to take a series of photos of the planets. The image above shows those photos, isolated from the original series and are left to right, top to bottom: Venus, Earth, Jupiter, Saturn, Uranus, and Neptune.
From that distance, over 4 billion miles from the Sun, the planets each appear as little more than a bright dot against the vastness of interplanetary space.
“That’s here. That’s home. That’s us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. … There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world.”
– Carl Sagan