Aside from the amazing Rosetta mission there is quite a lot of other things going on, so here’s a video to catch up a little with NASA.by
Another bit of information from the flight of Ebb and Flow the twin spacecraft of the GRAIL mission. Essentially a topographical map blended with a gravity map to show gravitational anomalies thanks to the combined input from the Lunar Reconnaissance Orbiter and Grail.
Best to let NASA explain:
Topography of Earth’s moon generated from data collected by the Lunar Orbiter Laser Altimeter, aboard NASA’s Lunar Reconnaissance Orbiter, with the gravity anomalies bordering the Procellarum region superimposed in blue. The border structures are shown using gravity gradients calculated with data from NASA’s Gravity Recovery and Interior Laboratory (GRAIL) mission. These gravity anomalies are interpreted as ancient lava-flooded rift zones buried beneath the volcanic plains (or maria) on the nearside of the Moon.
The twin GRAIL (Gravity Recovery and Interior Laboratory) spacecraft, Ebb and Flow, gathered data during their mission while orbiting the moon and they give us a little bit of an explanation of what the results show.
There hasn’t been too much coming out about the mission since this almost a year ago: NASA’s GRAIL Mission Puts a New Face on the Moon
Here’s the press release from the NASA:
A view of Earth’s moon looking south across Oceanus Procellarum, representing how the western border structures may have looked while active. The gravity anomalies along the border structures are interpreted as ancient, solidified, lava-flooded rifts that are now buried beneath the surface of the dark volcanic plains, or maria, on the near side of the moon.
The MAVEN spacecraft will enter a Martian orbit on 21 September. After a six-week period of fine tuning the orbit and scientific instruments the spacecraft will begin to take measurements of the composition, structure and escape of gases in Mars’ upper atmosphere and its interaction with the sun and solar wind.
NOTE: The SpaceX launch has changed the launch date and time – see the previous post.by
Rosetta has been eclipsing most of the news lately, as it should. NASA is also staying busy as always and the first data is coming in from the Orbiting Carbon Observatory-2.
Part of the update is about the Cygnus spacecraft leaving the ISS laden with trash. The Cygnus is about to re-enter the atmosphere and will burn up. This should occur at 13:11 UTC / 0911 EDT, today (Sunday). The atmospheric interface will occur between New Zealand and South America and is timed so the ISS crew can observe the fiery demise of the spacecraft.by
The Voyager 1 spacecraft now has felt another “tsunami wave”, a pressure wave generated by a coronal mass ejection from the sun. The “tsunami wave” takes about a year to reach Voyager and they can tell because of the way the thin plasma around the spacecraft acts.
The weird thing is this plasma is denser than what Voyager was flying through previously. All of this points to more evidence the Voyagers have entered the area of interstellar space outside our solar bubble. Yeah that’s way out – Go Voyagers!
More dense? Confused? I was too, read the explanation from the NASA JPL site below:
NASA’s Voyager 1 spacecraft has experienced a new “tsunami wave” from the sun as it sails through interstellar space. Such waves are what led scientists to the conclusion, in the fall of 2013, that Voyager had indeed left our sun’s bubble, entering a new frontier.
“Normally, interstellar space is like a quiet lake,” said Ed Stone of the California Institute of Technology in Pasadena, California, the mission’s project scientist since 1972. “But when our sun has a burst, it sends a shock wave outward that reaches Voyager about a year later. The wave causes the plasma surrounding the spacecraft to sing.”
Data from this newest tsunami wave generated by our sun confirm that Voyager is in interstellar space — a region between the stars filled with a thin soup of charged particles, also known as plasma. The mission has not left the solar system — it has yet to reach a final halo of comets surrounding our sun — but it broke through the wind-blown bubble, or heliosphere, encasing our sun. Voyager is the farthest human-made probe from Earth, and the first to enter the vast sea between stars.
The Low-Density Supersonic Decelerator (LDSD) launched yesterday by balloon from the US Navy’s Pacific Missile Range Facility in Kauai, Hawaii.
The balloon was launched at 08:45 local HST and by 11:05 HST the test vehicle was released at an altitude of 120,000 feet or 36.6 km. The decent took a half hour and the est vehicle hardware, black box data recorder and parachute were all recovered later in the day.
This first of three test planned tests designed to determine the flying ability of the vehicle and it also deployed two new landing technologies as a bonus.
The test apparently went very well:
“Because our vehicle flew so well, we had the chance to earn ‘extra credit’ points with the Supersonic Inflatable Aerodynamic Decelerator [SIAD],” said Ian Clark, principal investigator for LDSD at JPL. “All indications are that the SIAD deployed flawlessly, and because of that, we got the opportunity to test the second technology, the enormous supersonic parachute, which is almost a year ahead of schedule.”
Here are a couple of links to video of the test / flight:by