ESA Science & Technology - Publication Archive
- Europe to Mercury
- Mercury rising: coping with high temperatures
- Building and testing BepiColombo
- Introducing the fleet
- Meeting Mercury
- From Messenger to BepiColombo
- An international endeavour
The internal Phase 0 study of the Laser interferometer Space Antenna (LISA) mission has been performed at ESA's Concurrent Design Facility (CDF) and ran from 8 March to 5 May 2017. An internal final presentation has been prepared by the CDF Team, summarizing the outcome of the Phase 0 study. This presentation can be downloaded as a PDF (28 MB) by clicking the image to the right, or the 'link to publication' link below.
Contents of the presentation:
|p.6||CDF Study objectives||p.207||Data handling|
|p.124||Ground segment and operations||p.270||Thermal control|
|p.135||DFACS - AOCS||p.282||Risk|
|p.156||Chemical propulsion||p.306||Programmatics / AIV|
In February 2014, PLATO (PLAnetary Transits and Oscillation of stars) was selected as the M3 mission in the Cosmic Vision 2015-2025 programme. This report (also known as the Red Book) provides a high-level summary of the large number of scientific and technical documents produced as outcome of the definition study for the PLATO mission.
Outbursts occur commonly on comets with different frequencies and scales. Despite multiple observations suggesting various triggering processes, the driving mechanism of such outbursts is still poorly understood. Landslides have been invoked to explain some outbursts on comet 103P/Hartley 2, although the process required a pre-existing dust layer on the verge of failure. The Rosetta mission observed several outbursts from its target comet 67P/Churyumov–Gerasimenko, which were attributed to dust generated by the crumbling of materials from collapsing cliffs. However, none of the aforementioned works included definitive evidence that landslides occur on comets. Amongst the many features observed by Rosetta on the nucleus of the comet, one peculiar fracture, 70 m long and 1 m wide, was identified on images obtained in September 2014 at the edge of a cliff named Aswan. On 10 July 2015, the Rosetta Navigation Camera captured a large plume of dust that could be traced back to an area encompassing the Aswan escarpment. Five days later, the OSIRIS camera observed a fresh, sharp and bright edge on the Aswan cliff. Here we report the first unambiguous link between an outburst and a cliff collapse on a comet. We establish a new dust-plume formation mechanism that does not necessarily require the breakup of pressurized crust or the presence of supervolatile material, as suggested by previous studies. Moreover, the collapse revealed the fresh icy interior of the comet, which is characterized by an albedo >0.4, and provided the opportunity to study how the crumbling wall settled down to form a new talus.
The evolution of the collapse of the Aswan cliff, observed by the OSIRIS Narrow Angle Camera (NAC) and the Rosetta Navigation camera (NavCam), is shown in Fig. 1.
[Remainder of abstract truncated due to character limitations]