Astronomy: October 2018 Archives

Embattled Thirty Meter Telescope scores big win in Hawaii's highest court, Nature

"Hawaii's supreme court has ruled in favour of building the Thirty Meter Telescope (TMT) atop the mountain Mauna Kea. The decision removes the last legal hurdle preventing the US$1.4-billion project from resuming construction on Hawaii's Big Island. "It is a tremendously important and significant decision that provides secure legal grounds to restart construction of this transformative facility," says Michael Balogh, an astronomer at the University of Waterloo in Canada who chairs an advisory committee that represents Canadian astronomers' interests in the TMT."

NASA Retires Kepler Space Telescope

"After nine years in deep space collecting data that indicate our sky to be filled with billions of hidden planets - more planets even than stars - NASA's Kepler space telescope has run out of fuel needed for further science operations. NASA has decided to retire the spacecraft within its current, safe orbit, away from Earth. Kepler leaves a legacy of more than 2,600 planet discoveries from outside our solar system, many of which could be promising places for life."

Hubble Is Working Again

Hubble Moving Closer to Normal Science Operations

"NASA took great strides last week to press into service a Hubble Space Telescope backup gyroscope (gyro) that was incorrectly returning extremely high rotation rates. The backup gyro was turned on after the spacecraft entered safe mode due to a failed gyro on Friday, Oct. 5. The rotation rates produced by the backup gyro have since reduced and are now within an expected range. Additional tests will be performed to ensure Hubble can return to science operations with this gyro."

NASA Chandra X-ray Observatory Update: Out Of Safe Mode

"The cause of Chandra's safe mode on October 10 has now been understood and the Operations team has successfully returned the spacecraft to its normal pointing mode. The safe mode was caused by a glitch in one of Chandra's gyroscopes resulting in a 3-second period of bad data that in turn led the on-board computer to calculate an incorrect value for the spacecraft momentum. The erroneous momentum indication then triggered the safe mode."

Chandra X-ray Observatory Enters Safe Mode; Investigation Underway

"At approximately 13:55 GMT on October 10, 2018, NASA's Chandra X-ray Observatory entered safe mode, where the telescope's instruments are put into a safe configuration, critical hardware is swapped to back-up units, the spacecraft points so that the solar panels get maximum sunlight, and the mirrors point away from the Sun. Analysis of available data indicates the transition to safe mode was nominal, i.e., consistent with normal behavior for such an event. All systems functioned as expected and the scientific instruments are safe. The cause of the safe mode transition is currently under investigation, and we will post more information when it becomes available."

Hubble Is In Safe Mode As Gyroscope Issues Are Diagnosed, NASA

"The gyro that failed had been exhibiting end-of-life behavior for approximately a year, and its failure was not unexpected; two other gyros of the same type had already failed. The remaining three gyros available for use are technically enhanced and therefore expected to have significantly longer operational lives. Two of those enhanced gyros are currently running. Upon powering on the third enhanced gyro that had been held in reserve, analysis of spacecraft telemetry indicated that it was not performing at the level required for operations. As a result, Hubble remains in safe mode. Staff at NASA's Goddard Space Flight Center and the Space Telescope Science Institute are currently performing analyses and tests to determine what options are available to recover the gyro to operational performance."

Keith's 7 October note: According to these tweets from Dr. Rachel Osten, Deputy Mission Head for the Hubble Space Telescope at the Space Telescope Science Institute, the Hubble Space Telescope is in Safe Mode after a gyroscope failure. No word from NASA PAO yet.

Keith's 8 October 9:21 am EDT update: According to According to this update: "Daily Report #8120 Period Covered: 08:00 PM October 06, 2018 - 07:59 PM October 07, 2018 (DOY 280/0000z - 280/2359z) There were no scheduled observations during the report period."



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This page is an archive of entries in the Astronomy category from October 2018.

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