Neowise Comet 2020

Discussion in 'Off-Topic' started by litesong, Jul 13, 2020.

  1. litesong

    litesong litesong

    In the old Hubble North 10+ day exposure (with updated exposures) of a very very tiny & “empty” spot in Ursa Major, millions of celestial objects have appeared. Now somewhat belatedly, astronomers have found a Blackhole in a starburst galaxy in the Hubble field, that appears to be “only” 750 million years old AFTER the Big Bang development of the Universe. Designated GNz7q, this galaxy is now a prime target for the James Webb telescope to study in depth.
    The Hubble image was taken of “empty” space “at random”. So the hope is, that GNz7q is NOT rare & many other similar celestial objects (& younger, further back in time?) will be found to be studied by James Webb. At the least, it is a sweet headstart for the James Webb, which itself is a sweet, much gambled “top of the game” headstart telescope. At the most, GNz7q is a spear point to “exactly” one of the main missions the James Webb was designed to find & study. Yeap…..headstarts on top of headstarts. That’s what you like to see in science!
     
    Last edited: May 20, 2022
  2. litesong

    litesong litesong

    Artemis rocket, this US initial unmanned effort to go back to the Moon with people, is in an unplanned hold(40 minutes from launch), trying to get one of the engines back into “cryogenic balance”. Said to be a complex & delicate procedure, it must be right or launch may not occur. As they say……….stand by.
    Minutes later, the hold continues. Time here in Washington state is 5:24 AM, PDT.

    Time is now 5:36 AM, PDT. The intended launch has been scrubbed. The third engine was not at the proper pre-launch temperature. September 2, 2022 may be the next available launch date. Signing off……
     
    Last edited: Aug 30, 2022
    EdwinTheMagnificent likes this.
  3. litesong

    litesong litesong

    James Webb telescope is pumping out lots of new & mind bending images & data of all kinds of scientific interest (despite the sticky wheel on one of the instruments affecting the MIRI observations). There is an image of the NGC galaxy 628 (Messier 74) that is considered to be the best by James Webb telescope, chosen by readers of the website Universe Today. For mild extra interest to someone that followed my Pentax camera lens observations of Zeta Piscium(October 6, 2020) is that NGC 628 as viewed on star charts, is LESS than 10arcdegrees away from Zeta Piscium in a north-northeast direction. In my amateur astronomy heyday, when I could handle the big telescopes & set them up, I saw NGC 628 many decades ago.
     
    Last edited: Oct 29, 2022
  4. litesong

    litesong litesong

    A few belated remarks as the Orion spacecraft is nearing the Moon, days after being launched by the Artemis rocket from Earth.

    First, the Artemis nighttime launch was truly spectacular. People viewing from 3+ miles away, were illuminated as if in bright daylight. As occurred with the Saturn 5 launch to the moon, the Artemis rose truly majestically into the sky. The tail plume from the rocket began extending, longer than any rocket launch I’ve seen. More wieners could have been roasted with quite a bit of smokey flavor than during any other rocket launch. Maybe the Saturn 5 plume could have been as impressive, but I don’t remember any of the Saturn 5 launches were at nighttime.

    Second, the unmanned Orion spacecraft is leisurely traveling to save resources, taking days longer than any manned mission to the Moon. Maybe, future manned missions will take a quicker trip to the Moon. Anyhow, the Orion spacecraft journey is to be innovative & interesting. Already Orion is placed in a position “ahead” of the Moon’s orbit around the Earth. It will have a burn to slow itself & Orion will move around the back side of the Moon in a retro-grade direction, being opposite of the Moon’s direction around the Earth. It will whip around the Moon once(?) & then be propelled into an large “slow” elliptical orbit, that will take Orion about 30,000 miles from the Moon & also further from the Earth. Orion will then return to the Moon, & whip around the moon (once?) in a “normal” orbital direction. Orion will then power away from the Moon, but in a near “beeline” for the Earth. I haven’t heard, but Orion may return to the Earth much quicker than it proceeded away from the Earth, after Earth launch. Also not sure, but all this razzle-dazzle may be to test the Orion rocket’s reliability & its ability to accomplish numerous & long enduring burns that will be necessary on future extended journeys to the Moon & back to Earth.

    Third, this is minor, but I considered it interesting. I thought the solar panels on the Orion were fairly small. That might be because the panels will stay deployed, even when Orion engine is powering the spacecraft in its maneuvers. Anyhow, those relatively small solar panels will generate a total of 13kiloWatts of power to supply all the electronics. That’s a lot of power for such small panels. But of course, the panels are really really efficient & there isn’t any atmosphere to attenuate the sun’s radiation. Still, 13 kilowatts is cool.

    PS 12:11PM, PST, 11-20-22……….Orion is presently 232,900 miles from Earth AND his been about the same distance for some hours, & as stated in “front” of the Moon. Orion has a speed of 351MPH relative to Earth. The Moon in its orbit & Orion are approaching each other at a closing rate of 1.24 miles every second, or 4460MPH.
     
    Last edited: Nov 21, 2022
  5. litesong

    litesong litesong

    Time is 4:35AM, PST, & I just saw the Earth dip behind the Moon when Orion was only 1000+ MIles away from the Moon! The Orion signal is now lost because the Moon is in the way. Seems like Orion could have sent the signal to another spacecraft, which could have relayed the signal to Earth. But oh, well.
    Orion is in a retro-grade orbit, 734 miles from the Moon at 4:38AM, PST. Now Orion is 650 miles above the Moon at 4:42AM,PST. ORION engine is about to ignite to slow Orion, so it will orbit the Moon & whip around it. Now at 4:48AM, PST, Orion is 600 miles from the Moon. Signal will be acquired in 12 minutes.
    At 5PM,PST signal has been re-acquired & Earth is looking very small in space. Orion got as low as 80 miles from Moon’s surface.

    At 5:30AM,PST, Orion is sweeping Earthside around the Moon in its retro-grade orbit at a Moon distance of 1000 miles & less than 229,000 miles from Earth. Video coverage is terrible. Elon Musk must find this completely unacceptable!
     
    Last edited: Nov 21, 2022

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