Sentences with phrase «argued planetary scientist»

Between 4.4 and 4.5 billion years ago, Earth may have had not just one moon but two, argued planetary scientist Erik Asphaug of the University of California, Santa Cruz.

There's not enough pollution in the rings for them to have been around for a long time, argues planetary scientist Paul Estrada of the SETI Institute in Mountain View,

Not exact matches

Planetary scientist Bill Farrell of NASA's Goddard Space Flight Center in Greenbelt, Maryland, and colleagues will argue in Geophysical Research Letters that we shouldn't give up the search just yet, however.

Climate scientist Jon Foley of the University of Minnesota, who is part of a team of researchers that defined safe limits for 10 planetary systems, including climate, argues for erring on the side of caution.

It has puzzled astronomers and planetary scientists ever since, who have argued over the decades about Pluto's origin, size, mass, composition and classification.

A layer of iron and other elements deep underground is the evidence scientists have long been seeking to support the hypothesis that the moon was formed by a planetary object hitting the infant Earth some 4.5 billion years ago, a new study led by Johns Hopkins University scientists argues.

So argue two Mars scientists behind a controversial new push to relax planetary protection rules — a set of sterilisation procedures that Mars - bound spacecraft must undergo to avoid contaminating the planet with terrestrial microbes.