Where do you suppose this rocky, jagged peak is located? Sierra Nevada? The French Alps? The Himalayas? Actually this craggy mountain is located much, much farther away than any of those Earthly ranges (although it’s currently getting closer by the day) – this is a peak on the 4-km-wide nucleus of Comet 67P/Churyumov-Gerasimenko, imaged by ESA’s orbiting Rosetta spacecraft 435 million km away!
I wonder when ski season opens?
Here at Lights In The Dark I typically keep the articles and information to exploration occurring within our Solar System. But there have been amazing advances in the discovery of worlds far beyond our own family of planets and this recent news is quite fascinating: astronomers have spotted what appears to be a large gaseous exoplanet in the process of formation around a star only 335 light-years away — literally one of our own cosmic neighbors! Not only is this serendipitous, but also provides insight to how the planets and moons in our own Solar System may have formed, 4.6 billion years ago.
Whether you think Pluto is a planet, a dwarf planet, a Kuiper Belt Object – or something else entirely – you should still be fascinated by this: a video of the dwarf planet Pluto and its largest moon Charon showing the two distinctly separate worlds actually in motion around each other! Captured by the New Horizons spacecraft from July 19–24, the 12 images that comprise this animation were acquired with the Long Range Reconnaissance Imager (LORRI) instrument from distances of 267 million to 262 million miles (429 million to 422 million km) and show nearly a full orbital rotation. Amazing!
We don’t have to keep asking “Rosetta are we there yet?” anymore – we’re there! This morning, August 6 2014, Rosetta made its arrival at the ~4-km-wide comet 67P/Churyumov-Gerasimenko, and soon sent back some incredible pictures of its surface taken with its OSIRIS science imager. The one above was acquired at a distance of 130 km (80 miles) and shows some very rugged terrain and large boulders, and but some rather smooth, flat regions too. (The same area had been imaged a few days earlier – see at right – but the closer distance obviously allows for much more detail.) Congratulations to ESA and Rosetta for becoming the first mission to rendezvous with a comet! Now the real science can begin!
“Europe’s Rosetta is now the first spacecraft in history to rendezvous with a comet, a major highlight in exploring our origins,” said Jean-Jacques Dordain, ESA’s Director General. “Discoveries can start.”
“After ten years, five months and four days traveling towards our destination, looping around the Sun five times and clocking up 6.4 billion kilometers, we are delighted to announce finally ‘we are here.’
Jean-Jacques Dordain, ESA’s Director General
How exciting – it’s almost time! After over ten years of travel ESA’s comet chaser Rosetta is mere hours away from its first rendezvous with the 4-km-wide comet 67P/Churyumov-Gerasimenko! We’ve all been seeing better and better images of the comet since it first became visible to Rosetta a few months back, with the past couple of weeks bringing us some exceptionally intriguing views as the spacecraft closes the gap, but on Wednesday, August 6 Rosetta will have officially arrived — and I can only imagine what we’ll be seeing then!
Three enormous volcanic eruptions on Jupiter’s moon Io were witnessed by scientists last year using the Keck II and Gemini telescopes in Hawaii. The only other confirmed volcanically-active world in the solar system besides Earth, Io is constantly being resurfaced by eruptions and lava flows, due to internal heat and pressures caused by tidal stresses as a result of its elliptical orbit around Jupiter. These recent outbursts were exceptionally powerful, sending huge amounts of incredibly hot molten material out into space and likely coating a large area on its surface as well.
“We typically expect one huge outburst every one or two years, and they’re usually not this bright,” said Imke de Pater, professor and chair of astronomy at UC Berkeley and lead author of a paper describing the 2013 eruptions. “Here we had three extremely bright outbursts, which suggest that if we looked more frequently we might see many more of them on Io.”
She’s almost there! After a decade of soaring through the inner solar system ESA’s Rosetta spacecraft (and Philae lander) are now on final approach to Comet 67P/Churyumov-Gerasimenko, the ultimate goal of the mission. On August 6 the spacecraft will approach within 100 km of the comet and attempt to establish orbit — if successful, Rosetta will become the first spacecraft ever to do so!
In the meantime we are getting treated to better and better images of the comet’s 4-km-wide nucleus as Rosetta closes the gap. The picture above was taken just yesterday, July 31, with the spacecraft’s navigational camera. Details of 67P’s unexpected double-lobed contact binary shape are becoming more evident, with surface features coming into view. As we’ve discovered several times before, every comet is a unique world – and 67P is no exception! Click below for an even better view…