Tod R. Lauer

@TodLauer

Extragalactic Astronomy and Spacebased Imaging

Tucson, AZ
Vrijeme pridruživanja: studeni 2014.

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  1. 2. velj
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  2. 30. sij

    More on Wolf 359, which New Horizons is going to look at. Nearby flare star, with two candidate planets. notes that observers there can see the Earth transit the sun. Beside the STNG Borg battle, there's an Outer Limits episode based on it: .

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  3. 30. sij

    And with two stars, we can do navigation of NH (well crudely). This will take stellar navigation into the interstellar regime.

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  4. 30. sij

    This is the first ever demo of parallax with the stellar PSFs HWFM << parallax and simultaneous measures at both ends of the baseline, no proper motion corrections needed. The parallax displacements will be big and obvious

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  5. 30. sij

    Both stars can be imaged by amateurs with 6" telescopes or so and an electronic camera. Off the main page we give times to observe to have 1s simultaneity (in the star's frame) with NH. WIth Brian May's help we can make real 3D images with the close stars popping out.

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  6. 30. sij

    Hey! New Horizons is so far away that Proxima Cen shifts by 32 arcsec and Wolf 359 by 16, and we're going to show that by taking images of their fields on April 22-23 and comparing them to simultaneous Earth-based images.

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  7. 24. sij

    Action video of New Horizons image processing.

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  8. 23. sij

    What's a planetary encounter like? This is a pretty accurate representation of the New Horizon Arrokoth encounter by (Henry Throop) who took all the pictures and put them together into this wonderful video. It really seemed about this fast!

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  9. 19. sij

    Here’s a wondering rendition of Betelgeuse’s luminosity excursions by

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  10. 9. sij

    No AAS meeting is complete without a talk with an out of control laser pointer. Every word indicated as spoken.

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  11. proslijedio/la je Tweet
    7. sij

    . can observe within 45 degrees of the Sun, so it can look at Venus!

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    3. sij

    This video should be playing on every screen on the planet.

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  13. 28. pro 2019.

    Snow covering the Catalinas today

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  14. 27. pro 2019.

    Just had a look at "Universe" a gorgeous Canadian B&W documentary from 1960, which had heavy influence on the production of "2001," included later important work by the narrator. But OMG - the astronomer clambering around the telescope - OK...

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  15. 26. pro 2019.

    Can we please dispense with this nonsense?

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  16. 23. pro 2019.

    OK - another spectacular and impressively rich thread on Betelgeuse

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  17. 23. pro 2019.

    An excellent thread on Betelgeuse, starting with a sim that shows the immense size of its convection shells.

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  18. 22. pro 2019.

    It also looks from present best-buy models that we've got the better part of 100k years to go. Here's a paper on all things Betegeuse:

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  19. 22. pro 2019.

    And I wouldn't think of a SN event just now. As close as Betelgeuse is, when you hit O/Ne burning in the last year of its life (or so), the core is going to be so hot that it will wail in neutrinos and we should see that. We will actually know when it's fixing to go.

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  20. 22. pro 2019.

    or non-redundant aperture masks also would be handy. The goal is to resolve the state of the atmosphere just now. Disk resolved spectroscopy (VLT/Gravity?) would be especially attractive. HST could provide UV, but with the apparent cooling, this would probably not offer much.

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