Including Original "Paul H. Letters" Copyright © 1996-2017 Paul V. Heinrich - All rights reserved.



Saturday, 28 January 2017

Articles About Meteorites And Asteroids

Articles About Meteorites And Asteroids

Meteorite Studies Reveal Surprises About Earth's Formation
By Elizabeth Howell, SpaceCom, January 26, 2017
http://www.space.com/35468-earth-building-blocks-different-than-thought.html

Nice picture of Meteorite On Mars

Curiosity Finds An(other) Alien Visitor on Mars
Earth Isn't the Only Planet Hit by Meteorites. Mars Gets
Them, Too. by Phil Plait, Blog-Slate Magazine, January 23, 2017
http://www.slate.com/blogs/bad_astronomy/2017/01/23/curiosity_sees_a_meteorite_on_the_surface_of_mars.html

This image was taken by Mastcam: Right (MAST_RIGHT)
onboard NASA's Mars rover Curiosity on Sol 1577
(2017-01-12 11:21:52 UTC). NASA/JPL-Caltech/MSSS
http://mars.nasa.gov/msl/multimedia/raw/?rawid=1577MR0080320000800289E01_DXXX&s=1577

Deflecting Asteroids

Objective: To deflect asteroids, thus preventing their collision
with Earth Space Daily, Madrid, Spain, January 27, 2017
http://www.spacedaily.com/reports/Objective_To_deflect_asteroids_thus_preventing_their_collision_with_Earth_999.html

Scientists working on deflecting asteroids headed for Earth
The Indian Express, January 27, 2017
http://indianexpress.com/article/technology/science/scientists-working-on-deflecting-asteroids-headed-for-earth-4493719/

Yours,

Paul H.

Deflecting Asteroids

Deflecting Asteroids

Objective: To deflect asteroids, thus preventing their collision
with Earth Space Daily, Madrid, Spain, January 27, 2017
http://www.spacedaily.com/reports/Objective_To_deflect_asteroids_thus_preventing_their_collision_with_Earth_999.html

Scientists working on deflecting asteroids headed for Earth
The Indian Express, January 27, 2017
http://indianexpress.com/article/technology/science/scientists-working-on-deflecting-asteroids-headed-for-earth-4493719/

Yours,

Paul H.

Nice Picture of Meteorite On Mars

Nice Picture of Meteorite On Mars

Curiosity Finds An(other) Alien Visitor on Mars
Earth Isn't the Only Planet Hit by Meteorites. Mars Gets
Them, Too. by Phil Plait, Blog-Slate Magazine, January 23, 2017
http://www.slate.com/blogs/bad_astronomy/2017/01/23/curiosity_sees_a_meteorite_on_the_surface_of_mars.html

This image was taken by Mastcam: Right (MAST_RIGHT)
onboard NASA's Mars rover Curiosity on Sol 1577
(2017-01-12 11:21:52 UTC). NASA/JPL-Caltech/MSSS
http://mars.nasa.gov/msl/multimedia/raw/?rawid=1577MR0080320000800289E01_DXXX&s=1577

Yours,

Paul H.

Thursday, 26 January 2017

Online Comet and Meteorite Lectures

Online Comet and Meteorite Lectures

P33I Whipple Lecture:
The Complex Evolution of Comet Nuclei
American Geophysical Union (AGU)
Published on Aug 4, 2015
AGU Fall Meeting 2011 - P33I
https://www.youtube.com/watch?v=hf4irGb8QLE

The meaning of meteorites
Royal Astronomical Society
Published on Mar 24, 2015
Royal Astronomical Society public lecture, 10 February 2015
by Dr Ted Nield, Geoscientist Magazine
https://www.youtube.com/watch?v=6lgd_bJELtM

Yours,

Paul H.

Tuesday, 24 January 2017

Rare meteorites common in the Ordovician period

Rare meteorites common in the Ordovician period

A 466-million-year-old space collision is still raining shrapnel
on Earth By Sarah Kaplan, Washington Post, January 23, 2016
https://www.washingtonpost.com/news/speaking-of-science/wp/2017/01/23/a-466-million-year-old-space-collision-is-still-raining-shrapnel-down-on-earth/

Today’s rare meteorites were once common, The Field Museum,
Monday, January 23, 2017
https://www.fieldmuseum.org/science/blog/todays-rare-meteorites-were-once-common

The paper is:

Heck, P. R., B. Schmitz, W. F. Bottke, S. S. Rout, N. T. Kita, A. Cronholm,
C. Defouilloy, A. Dronov, and F. Terfelt, 2017, Rare meteorites common
in the Ordovician period. Nature Astronomy 1, Article number: 0035 (2017)
doi:10.1038/s41550-016-0035
http://www.nature.com/articles/s41550-016-0035

Yours,

Paul H.

Monday, 23 January 2017

Cosmic dust found in city rooftop gutters

Cosmic dust found in city rooftop gutters
PhysOrg, December 7, 2016

https://phys.org/news/2016-12-cosmic-city-rooftop-gutters.html

http://www.sciencealert.com/cosmic-dust-has-been-discovered-on-city-rooftops-for-the-first-time

The paper is:
Genge, M.J., J. Larsen, M. Van Ginneken, and M.D. Suttle, 2016,
An urban collection of modern-day large micrometeorites:
Evidence for variations in the extraterrestrial dust flux through
the Quaternary. Geology, First published online December 2016,
doi: 10.1130/G38352.1

http://geology.gsapubs.org/content/early/2016/12/05/G38352.1.abstract

https://spiral.imperial.ac.uk/bitstream/10044/1/42484/9/Geology-2016-Genge-G38352.1.pdf

Yours,

Paul H.

Sunday, 15 January 2017

Multiple-Impact Theory of Moon's Origin Revisited

Multiple-Impact Theory of Moon's Origin Revisited

Study suggests Earth once had many moonlets — until they
merged to form the moon By Sarah Kaplan, Washington Post
https://www.washingtonpost.com/news/speaking-of-science/wp/2017/01/10/study-suggests-earth-once-had-many-moonlets-until-they-merged-to-form-the-moon/

How Earth's previous moons collided to form the moon:
New theory. American Technion Society, January 9, 2017
https://www.sciencedaily.com/releases/2017/01/170109125125.htm

The Many-Moons Theory by Alan Burdick, The New Yorker
http://www.newyorker.com/tech/elements/the-many-moons-theory

The paper is:

Rufu, R., O. Aharonson, and H. B. Perets, 2016, A multiple-
impact origin for the Moon. Nature Geoscience (2017)
doi:10.1038/ngeo2866 Received 14 September 2016
Accepted 30 November 2016 Published online 09 January 2017
http://www.nature.com/ngeo/journal/vaop/ncurrent/full/ngeo2866.html

Yours,

Paul H.

Moon Zircons dated at 4.51 Billion Years

Moon Zircons dated at 4.51 Billion Years

The moon is older than scientists thought, UCLA-led
research team reports< UCLA Newsroom, January 11, 2017
http://newsroom.ucla.edu/releases/the-moon-is-older-than-scientists-thought-ucla-led-research-team-reports

Scientists: Moon over the hill at 4.51 billion years old
By Marcia Dunn and Associated Press, Washington Post,
January 13, 2016
https://www.washingtonpost.com/national/health-science/the-moon-is-older-than-scientists-thought/2017/01/13/7633e5f2-d83a-11e6-9a36-1d296534b31e_story.html

Moon is much older than we thought, scientists find
The Independent, Andrew Griffen, January 12, 2017
http://www.independent.co.uk/news/science/moon-age-how-old-earth-planet-satellite-science-scientists-ucla-a7524071.html

the paper is:

Barboni, M., P. Boehnke, B. Keller, I. E. Kohl, B. Schoene,
E. D. Young, and Kevin D. McKeegan, 2016, Early formation
of the Moon 4.51 billion years ago. Science Advances.
Vol. 3, no. 1, e1602365,DOI: 10.1126/sciadv.1602365
http://advances.sciencemag.org/content/3/1/e160236
http://advances.sciencemag.org/content/3/1/e1602365.figures-only

Yours,

Paul H.