3 ms·
i read somewhere recently that this difference in path lengths can be measured in days, depending on distance and how off-center the lensing is.
by leeoniya 4y ago
i read somewhere recently that this difference in path lengths can be measured in days, depending on distance and how off-center the lensing is.
- lasc4r 4y agoThat's pretty amazing, I'd certainly not expect more than a small time shift since it still managing to get the same light source to the same location to be detected.
- btilly 4y agoThe lensed light has generally traveled for billions of years, and wound up being separated by thousands of light years before the gravitational lensing. Two paths taking days apart DOES count as only a small time shift!
- leeoniya 4y agoor decades https://news.berkeley.edu/2015/03/05/distant-supernova-split-four-ways-by-gravitational-lens/ https://news.berkeley.edu/2015/03/05/distant-supernova-split...