Amazing. Scrolling down one of the comments has an animation of starts around the center of the Milky Way. I have seen a few short ones of nebulae. There should be much much more of this sort of thing.
I appreciate that scientist are not always after the pretty pictures. They can be expensive, do not always give the data needed, and the experiments do not always produce data that has obvious pretty picture potential. Still, for the average non professional scientist (me) the pictures are about all I will ever get out of the science.
A good chunk of science communication centres around how one conveys the wow factor to folks who aren't already obsessed with the particular field. Images like this really help sell it to the rest of us
The galactic center data actually proved there was a supermassive black hole at the center of the Milky Way, and weighed it precisely from those stars motions. The name of the account that posted that animation (Sagittarius A*) is the name of that supermassive black hole.
Wow, in terms of angle, how far are these planets separated from the star?
I always thought we would never be able to image something like that. The distances would be too small and the contrast too large to figure something at the resolution we can get on earth. I'll need to read up on how this was done.
The scale bar (20 AU) represents 20 time the distance between the Earth and the sun. This star is about 41 parsecs away, so the angular size of that scale bar is about half an arcsec. (One degree is split into 60 arcminutes, one arcminute into 60 arcseconds. Just like a clock).
That angle is about the diameter of a US quarter coin seen from 11km (7mi) away.
Yea, the planets are gigantic, and in distant orbits from their star. I don't think we even have the ability yet to directly image exoplanets much smaller than, say, Saturn, or closer to their stars than Saturn.
The noise from the blocked-out star noticably decreases in 2017. Is that due to changes in the stars' activity cycle, or is that due to better processing/capture technology?
From ~0:04 - 0:05, two dots at ~10 and 8 o'clock fade in and out simultaneously, with roughly the size and brightness of the planets. They peak at observation ~2016-07-06. Any idea what they are?
Their balanced position and simultaneous changes make them seem like an artifact of the imaging.
Amazing. Scrolling down one of the comments has an animation of starts around the center of the Milky Way. I have seen a few short ones of nebulae. There should be much much more of this sort of thing.
I appreciate that scientist are not always after the pretty pictures. They can be expensive, do not always give the data needed, and the experiments do not always produce data that has obvious pretty picture potential. Still, for the average non professional scientist (me) the pictures are about all I will ever get out of the science.
A good chunk of science communication centres around how one conveys the wow factor to folks who aren't already obsessed with the particular field. Images like this really help sell it to the rest of us
The galactic center data actually proved there was a supermassive black hole at the center of the Milky Way, and weighed it precisely from those stars motions. The name of the account that posted that animation (Sagittarius A*) is the name of that supermassive black hole.
This work earned the 2020 Nobel Prize in Physics: https://www.nobelprize.org/prizes/physics/2020/summary/
Wow, in terms of angle, how far are these planets separated from the star?
I always thought we would never be able to image something like that. The distances would be too small and the contrast too large to figure something at the resolution we can get on earth. I'll need to read up on how this was done.
The scale bar (20 AU) represents 20 time the distance between the Earth and the sun. This star is about 41 parsecs away, so the angular size of that scale bar is about half an arcsec. (One degree is split into 60 arcminutes, one arcminute into 60 arcseconds. Just like a clock).
That angle is about the diameter of a US quarter coin seen from 11km (7mi) away.
https://en.wikipedia.org/wiki/HR_8799
Yea, the planets are gigantic, and in distant orbits from their star. I don't think we even have the ability yet to directly image exoplanets much smaller than, say, Saturn, or closer to their stars than Saturn.
TL;DR - Two inside (16, 26AU) and two outside (43, 69AU) Pluto's orbit (39AU). They are all estimated to be a bit bigger than Jupiter.
The noise from the blocked-out star noticably decreases in 2017. Is that due to changes in the stars' activity cycle, or is that due to better processing/capture technology?
I do not know, but my best guess would be an improved post processing algorithm was introduced.
When my mother was born, plate tectonics was a hypothesis. When I was born we didn't know for certain if planets existed outside of our solar system.
When my grandparents were born, we didn't know there were other galaxies.
They need to remove that one frame
From ~0:04 - 0:05, two dots at ~10 and 8 o'clock fade in and out simultaneously, with roughly the size and brightness of the planets. They peak at observation ~2016-07-06. Any idea what they are?
Their balanced position and simultaneous changes make them seem like an artifact of the imaging.