Initial Exoplanet Discoveries from TESS

[@hubblespacetelescope]

Talk begins at 22:21 for those who wish to skip News from the Universe. Enjoy!

[@S....]

Why would someone want to do it?

[@hjembrentkent6181]

I watch this for the news! Bring back News From Hubble And Across The Universe please!

[@jefffluckiger97]

always enjoy these lecture's

[@XYOdin]

TY

[@twstf8905]

James Webb launch is STILL a couple years away?!? WTF?!?

[@timclaydon5383]

JWST has had all sorts of delays, technical issues, budget cuts (and gains), more tech issues with the sun shield. JWST is at the very forefront of our abilities though, and it's being launched in an orbit around the Sun (about 1 million miles from Earth), which is currently unserviceable if something breaks. They really only get one shot, and it's our next leap forward beyond what Hubble can do. Might as well take the time necessary to ensure it's successful!

[@kellymcdonald1895]

Beautiful!

[@basknation]

very loud speaker

[@Nygge1982]

bits per seconds lol =) if i worked at nasa i would go crazy

[@eviscerations]

got a couple questions: a) due to the lack of any fuel limitation issues, can the continuous focal points for camera 4 be adjusted to potentially 'more interesting' areas than the designated polar regions after the initial survey is completed? b) why not look at blue giant systems? are they not chosen for a specific reason, such as instability or variable luminosity? c) what's the target 'range' for these surveys? is the focus within the galaxy, and if so, are we talking about out to perhaps 1000 light years, or 10,000? thanks

[@scottfleming8345]

Thanks for your questions. For a.), it is possible to re-orient the location of Camera 4 in an extended mission if one occurs. For b.) large stars are avoided when doing the planet search because the signal caused by an Earth-sized planet is too small for even TESS to reliably detect (the size of the dip is related to the size of the planet compared to the size of the star...the bigger the star, the smaller amount of it the planet blocks, thus the smaller the signal), but plenty of other science is able to be done with them from the Full Frame Images. For c.) TESS is primarily going to find planets for stars within 1,000 light years of the Sun, with most stars being within a few hundred light years. Other science, like stellar astrophysics and even studies of galaxies, can be done with the Full Frame Images for targets at all sorts of distances!

[@keybutnolock]

Great talk, great info, great presentation, great ! Small issue with audio but, well worth watching again. ( note to self ) WATCH AGAIN ! Thanks.

[@luisga3709]

Excellent, so exciting!!!!

[@AndreaVazquezOMG]

love his enthusiasm!!

[@krshna77]

1:12:10 to 1:12:40 can't believe how much this astronomy guy is failing at not only explaining, but even understanding fundamental physics and geometry, like basic gravitational interactions between 2 objects... A planet is orbiting because it feels a gravitational "tug"? Star is being pulled towards the orbiting planet? is this foxnews education channel?

[@joshuafraustro]

Yes, the star is being pulled towards the orbiting body. Scott is describing something called Doppler spectroscopy or the radial-velocity method. The doppler shift of a star's spectral lines caused by an orbiting body can be used to determine the body's mass.

[@sageriver7669]

Are there any merits on having a Moon based telescope over Earth based? Would it not be better to have a giant one there on the dark side?

[@cyrusaalborg]

How far in lightyears can the Hubble telescope observe ?

[@timclaydon5383]

Currently the most distant object (galaxy GN-z11) captured by Hubble is 13.4 billion light years, when the universe was only about 400 million years old. Since the universe is constantly expanding however, that galaxy is 32 billion light years distant! More info: en.wikipedia.org/wiki/GN-z11

[@cyrusaalborg]

Thanks Tim- I guess my problem starts when I hear about planet 9 , if we can observe other galaxys ,how come cant we SEE it -1 lightyear=63 AI

[@timclaydon5383]

@@cyrusaalborg Well because Planet 9 (or take Ultima Thule that New Horizons is visiting right now, or Pluto when it flew past a couple years ago) are incredibly tiny objects compared to galaxies. Also, those objects don't emit light, they only reflect a little light from our Sun, which is very distant. It also has to do with the optics - Hubble has a very narrow field of view, meaning it's like a microscope. An entire galaxy is made up of billions of stars too, and that's what Hubble is designed to look at.