Another NASA space telescope has shut down and halted science observations.
Less than a week after the Hubble Space Telescope went offline, the Chandra X-ray Observatory did the same thing. NASA said Friday that Chandra automatically went into so-called safe mode Wednesday, possibly because of a gyroscope problem.
Hubble went into hibernation last Friday because of a gyroscope failure.
Both orbiting observatories are old and in well-extended missions: Hubble is 28, while Chandra is 19. Flight controllers are working to resume operations with both.
NASA said it’s coincidental both went “asleep” within a week of one another. An astronomer who works on Chandra, Jonathan McDowell of the Harvard-Smithsonian Center for Astrophysics, tweeted Friday that “Chandra decided that if Hubble could have a little vacation, it wanted one, too.”
Launched by space shuttles in the 1990s, Hubble and Chandra are part of NASA’s Great Observatories series. The others are the Compton Gamma Ray Observatory, which was also launched in the 1990s but eventually failed and was destroyed, and the Spitzer Space Telescope, launched in 2003 and still working. Each was intended to observe the cosmos in different wavelengths. (VOA)
Scientists are analysing the images taken under harsh light conditions by the NASA Lunar Reconnaissance Orbiter (LRO) Camera of the area where the Vikram moon lander is likely to have touched down on the moon and it may be a while before they can locate it, project experts told IANS.
LRO project scientist at NASA’s Goddard Space Flight Center, Noah Petro, said on Wednesday that they were now analysing the images taken on Tuesday “and we will make a statement at some point when we can identify the lander.”
But he added, “It is important to remember that the illumination conditions right now where the lander may be are harsh.”
Therefore, it “could be difficult to identify right now (and it) may be a little longer before we have another opportunity to image the landing site next October 14” when the LRO next passes over that area of the moon.
The principal investigator for the LRO camera, Mark Robinson of Arizona State University, said that the last image of the area was acquired on Wednesday and will take time to analyse as there are “lots and lots and lots of pixels” to go through.
A NASA statement carried a note of caution saying that when the LRO flew over the Vikram landing the “local lunar time was near dusk; large shadows covered much of the area.”
The LROC “acquired images around the targeted landing site, but the exact location of the lander was not known so the lander may not be in the camera field of view,” NASA said.
“The LROC team will analyze these new images and compare them to previous images to see if the lander is visible (it may be in shadow or outside the imaged area),” it added.