Red and Brown Dwarfs: Understanding Our Smallest and Closest Stellar Neighbors
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- Опубліковано 28 вер 2024
- Serge Dieterich of the Space Telescope Science Institute
The majority of stars in our galaxy are smaller than our sun and some have diameters as small as Saturn’s. Many small red dwarfs are among the closest stars to our solar system, but are quite faint, making them harder to study. Both as individual objects and as a population, small stars have intriguing characteristics, some with distinct implications for what life on their planets could be like. It is also important to consider what properties are necessary for a body to be considered a star and how small stars are different from their lower mass cousins, the substellar brown dwarfs.
Host: Dr. Frank Summers of the Space Telescope Science Institute
Recorded live on Tuesday, December 3, 2019, at the Space Telescope Science Institute in Baltimore, Maryland, U.S.A.
More information: www.stsci.edu/public-lectures
For the second speaker: we appreciate depth as much as breadth, if not more. We would not mind going deeper into the mathematics of how we go from observation data to being placed on the HR diagram, for instance- and showing that would help those who don't understand the math, or younger audiences, better understand the math that goes on. That information is also harder to find, let alone find demonstrated, that triangulation parallax, for instance.
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The material is fascinating and brilliant. The second speaker was terrible. Why do they want to down dumb and stretch out the essential findings.
Need to focus your telescope. The image is horrible.
What is the TNT equivalent of a 1KM iceball hitting Earth @ 2x solar escape velocity
~2.38*10^23J of energy, or ~5.66*10^10 kilotons of TNT. Equivalent to a 16.725 km asteroid with a density of .6 g/cm^3 moving at 18 km/s.
If you ever visit NZ, be sure to visit Great Barrier Island near Auckland and Omarama in the South Island. Best spots for star gazing and gorgeous by day.
0h ok
Where are these presentations I would like to go to one,and how old do you have to be to go to one.
At the beginning of the lecture dr Summers gives the website name where you can get all the information. Anyway the place is
Space Telescope Science Institute in Baltimore, Maryland, U.S.A.
Notes:
Lectures on a diverse selection of cosmic topics are held the first Tuesday of every month in the STScI John N. Bahcall Auditorium. Admission is free and free parking is available in the lot across the street. Find information related to driving directions and relevant transportation resources on our Getting Here page. Further information and directions are available by calling 410-338-4700.
So firstly, there was intro, he talked about everything and nothing.. then he lost a topic completly.. and the lecture ended. With an advertisment. And no real.information beyond the bare basics..
Very bad lecture..
I thought the brown ones were the ones that hadn't met a dragon yet
48:00 'MURICA!
Haha, loved that story. And interesting lecture. Thanks!
Just lately I have been reading a book describing Einstein's experience of WW1
A story that I must recommend. I have just reached the point where a British astronomer, a Quaker, and a conscientious objector by the name of Eddington has received funding to observe an eclipse specifically for the purpose of testing Einstein's prediction of gravitational lensing. A must read.
@@kluandroid3095 Einstein's War