Daily briefing: ESA satellite forced to move to avoid SpaceX collision

No hard feelings after game of space chicken. Plus: the first iPS cornea transplant and India’s risky Moon landing.

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The transparent cornea protects the eye from damage.Credit: Ralph C. Eagle Jnr/Science Photo Library
A Japanese woman in her forties has become the first person in the world to have her cornea repaired using corneal cells made from induced pluripotent stem (iPS) cells. iPS cells are made by reprogramming adult skin cells from a donor into an embryonic-like state, from which they can transform into other cell types. Doctors say the womans vision has improved since the transplant.
Nature | 2 min read
After countless setbacks and delays, India will attempt to set a lander down on the Moon in the early hours of 7 September. The Chandrayaan-2 mission shot into space six weeks ago more than a year behind schedule ferrying an orbiter and a lander loaded with a six-wheeled rover. The missions main aims are to investigate the unexplored lunar south pole and provide the most detailed maps yet of sources of water on the Moon.
Nature | 5 min read
By the numbers
1 lunar day
The designed lifespan of Chandrayaan-2s Vikram lander and Pragyan rover thats about about 14 Earth days.
The European Space Agency (ESA) says it had to shift its Aeolus Earth observation satellite on Monday to avoid a collision with a spacecraft from SpaceXs multi-satellite Starlink system. SpaceX declined to yield after the US military alerted both organizations to the risk. But there are no hard feelings, says Holger Krag, head of ESAs Space Debris Office. There are no rules in space, he says. Nobody did anything wrong. Space is there for everybody to use. Theres no rule that somebody was first here.
Forbes | 5 min read
Workflow tools such as Snakemake, Nextflow and the Common Workflow Language (CWL) can make your computational methods portable, maintainable, reproducible and shareable. A Nature Toolbox article includes a worked example that shows how Snakemake helps turn raw data into scientific knowledge.
Nature | 7 min read
Learn to focus, dont sully your off-hours with work and dont try to be perfect when good-enough will do, says bioscience PhD candidate Alejandra Ortega. She shares her tips for achieving academic success while enjoying a social life.
Nature | 5 min read
A mathematical analysis of what it is to be human can take us only so far, writes mathematician Hannah Fry in her examination of what statistics can and cant tell us. She points to the example of Harold Shipman, a trusted British family doctor and prolific serial killer, as a case where stats could have saved lives. She also presents an intriguing list of real and imagined scenarios in which the concept of statistical significance points us in the wrong direction.
The New Yorker | 15 min read
We need a better understanding of the effects of tear gas and pepper spray and proper rules for their use, argues defence consultant Dan Kaszeta. (Nature)

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