PRESS-NEWS.org - Press Release Distribution
PRESS RELEASES DISTRIBUTION

New solar system formation models indicate that Jupiter's foray robbed Mars of mass

2011-06-06
(Press-News.org) Planetary scientists have long wondered why Mars is only about half the size and one-tenth the mass of Earth. As next-door neighbors in the inner solar system, probably formed about the same time, why isn't Mars more like Earth and Venus in size and mass? A paper published in the journal Nature this week provides the first cohesive explanation and, by doing so, reveals an unexpected twist in the early lives of Jupiter and Saturn as well.

Dr. Kevin Walsh, a research scientist at Southwest Research Institute® (SwRI®), led an international team performing simulations of the early solar system, demonstrating how an infant Jupiter may have migrated to within 1.5 astronomical units (AU, the distance from the Sun to the Earth) of the Sun, stripping a lot of material from the region and essentially starving Mars of formation materials.

"If Jupiter had moved inwards from its birthplace down to 1.5 AU from the Sun, and then turned around when Saturn formed as other models suggest, eventually migrating outwards towards its current location, it would have truncated the distribution of solids in the inner solar system at about 1 AU and explained the small mass of Mars," says Walsh. "The problem was whether the inward and outward migration of Jupiter through the 2 to 4 AU region could be compatible with the existence of the asteroid belt today, in this same region. So, we started to do a huge number of simulations.

"The result was fantastic," says Walsh. "Our simulations not only showed that the migration of Jupiter was consistent with the existence of the asteroid belt, but also explained properties of the belt never understood before."

The asteroid belt is populated with two very different types of rubble, very dry bodies as well as water-rich orbs similar to comets. Walsh and collaborators showed that the passage of Jupiter depleted and then re-populated the asteroid belt region with inner-belt bodies originating between 1 and 3 AU as well as outer-belt bodies originating between and beyond the giant planets, producing the significant compositional differences existing today across the belt.

The collaborators call their simulation the "Grand Tack Scenario," from the abrupt change in the motion of Jupiter at 1.5 AU, like that of a sailboat tacking around a buoy. The migration of the gas giants is also supported by observations of many extra-solar planets found in widely varying ranges from their parent stars, implying migrations of planets elsewhere in universe.

### The paper, "A Low Mass for Mars from Jupiter's Early Gas-Driven Migration," published in the June 5 issue of the journal Nature, was written by Walsh; Alessandro Morbidelli of the Université de Nice, France; Sean N. Raymond of Université de Bordeaux, France; David P. O'Brien of Planetary Science Institute in Tucson, Ariz.; and Avi M. Mandell of NASA's Goddard Space Flight Center. The research was funded by the Helmholtz Alliance, the French National Center for Scientific Research and NASA.


ELSE PRESS RELEASES FROM THIS DATE:

Mayo Clinic: Flaxseed no cure for hot flashes during breast cancer or menopause

2011-06-06
CHICAGO -- ASCO Abstract #CRA9015. Flaxseed provides no benefit in easing hot flashes among breast cancer patients and postmenopausal women, according to a Mayo Clinic and North Central Cancer Treatment Group (NCCTG) study. The randomized, placebo-controlled study was conducted on 188 women between October and December 2009 and found no statistically significant difference in mean hot flash scores between women taking flaxseed and those taking a placebo. Preliminary data published in 2007 by Mayo Clinic investigators suggested consuming 40 grams of crushed flaxseed daily ...

Netbook Navigator Selected by Microsoft to be 1 of 4 OEM Partners Showcased at ISTE 2011

Netbook Navigator Selected by Microsoft to be 1 of 4 OEM Partners Showcased at ISTE 2011
2011-06-06
Netbook Navigator (www.NetbookNavigator.com), a leading provider of mobile computing devices, today announced they were selected to be 1 out of 4 OEM partners showcased at the Microsoft booth at the International Society for Technology in Education conference later this month. This marks a major accomplishment for Netbook Navigator, who was one of the first companies to deliver a truly portable Windows 7 slate PC in the North American market. "We are honored and delighted to be chosen for such a prestigious occasion," said Matthew Gross, CEO of Netbook Navigator. ...

Exposure to BPA has been underestimated, new MU research says

2011-06-06
COLUMBIA, Mo. – A new University of Missouri study shows that the exposure to the controversial chemical Bisphenol A (BPA) through diet has been underestimated by previous lab tests. In the study, researchers compared BPA concentrations in mice that were given a steady diet supplemented with BPA throughout the day, compared to the more common lab method of single exposure, and found an increased absorption and accumulation of BPA in the blood of mice. This is the first study to examine concentrations of BPA in any animal models after exposure through a regular, daily ...

City of Hope researchers to present rectal cancer, palliative care, benchmarking studies at ASCO

2011-06-06
DUARTE, Calif. -- City of Hope researchers participated in more than 50 studies on improvements to cancer treatment, patient care and clinical trials to be presented at the 2011 Annual Meeting of the American Society of Clinical Oncology (ASCO) in Chicago, running from June 3 through 7. Research highlights include: "Impact of neoadjuvant chemotherapy following chemoradiation on tumor response, adverse events and surgical complications in patients with advanced renal cancer treated with TME."Abstract# 3514 Monday, June 6, 8 a.m. to 12 p.m. McCormick Place E450b Discussion: ...

Cigirex Sponsors Hollywood Movie Premiere of "Operation Belvis Bash" a Musical Comedy About a Struggling U.S. Rock-n-Roll Singer Sent to Afghanistan to Bring American Culture to its People

Cigirex Sponsors Hollywood Movie Premiere of "Operation Belvis Bash" a Musical Comedy About a Struggling U.S. Rock-n-Roll Singer Sent to Afghanistan to Bring American Culture to its People
2011-06-06
Cigirex LLC, a world leader in electronic cigarettes, is teaming up with Monster Energy to sponsor the after party of the West Coast Premiere of Operation Belvis Bash. The movie features a well known cast of Hollywood names including Corey Feldman, Daniel Baldwin, Alexander Loy, Mark Metcalf, Frank Stallone, the Iron Sheik and Noelle Locke. "We are delighted to showcase our alternative smoking products to movie fans, actors, and media at this exciting event and after party," said Cigirex President Jason Cardiff. "The entertainment industry has embraced ...

InfoTech Solutions for Business Unveils New Design for Media Management System

2011-06-06
Today, InfoTech rolled out a new design for the Media Management System (MMS), its Web-based solution for direct response campaign management. "This is quite an improvement, not only from an aesthetic standpoint, but also in terms of usability," said Derek Viglianti, InfoTech's EVP of Marketing Systems. "The user interface and reports look sharper, which is something that our clients had expressed an interest in seeing." In addition to its new design, MMS was upgraded with several new features, including new per inquiry functionality. This comes ...

Whataburger Introduces New Pineapple Pie and Shake

Whataburger Introduces New Pineapple Pie and Shake
2011-06-06
Today Whataburger announced two new additions to its menu, the Pineapple Pie and Pineapple Shake, both available for a limited time only. The new menu items will be available Monday, June 6 at 3 p.m. through Monday, August 22 at all Whataburger locations. "While we are known best for our fresh, made-to-order burgers, our pies and shakes have made a name for themselves as well," said Rich Scheffler, Whataburger Restaurants, LP Group Director of Marketing. "The newest pineapple pie and shake are the perfect tropical combination for summer." Whataburger ...

Shaftesbury London Hotels: Nothing Else Matters

2011-06-05
While the other parts experienced a deficit in tour and travel activities, the capital city has marked a whooping rise. Gaining to this, the London hotels are also currently refurbishing themselves in great numbers to accommodate global needs in the most appropriate manner. Most of these hotels offer the best of services that would surely enable any traveller to witness the true colours of British hospitality. But the major issue of the day is perhaps no other but to secure the services of cheap London hotels. To enable the world wide tourists to enjoy pocket friendly ...

Lakewood Transmission and Disposing of Transmission Fluid and Why Lakewood Transmission Should Be Your Transmission Specialist

2011-06-05
Lakewood Transmission points out that the fluids that help your car run smoothly and effectively are fine when they're used as intended—that is, when they're used in your car. But what to do when fluids need to be dumped or changed? Lakewood Transmission tells customers that many of the fluids in your car are harmful or toxic, and as such, should not be left around, thrown out or poured onto a remote patch of lawn. Antifreeze, for example, is known to attract animals, such as cats, due to its sweetness. However, antifreeze is also a poison, and needs to be kept out of ...

Basic Information on Heart Failure and Treatment

2011-06-05
Cardiologist NYC has indeed noted with absolute concern that the cases of new heart problems and complications in New York have been alarming to a huge degree. This has been followed by the sad realization of the fact that most residents of the city have not sought the indispensable services of cardiologists for their potential and current heart worries despite the widely acclaimed excellence of New York cardiologists and particularly cardiologist NYC. The primary role of a cardiologist as cardiologists NYC would like to observe is basically to ensure the heart and its ...

LAST 30 PRESS RELEASES:

Obesity-associated cancers tripled nationwide over past two decades

Consuming certain sweeteners may increase risk of early puberty

Experts suggest screening women with diabetes for intent to conceive at every doctor visit

Osteoporosis treatment benefits people older than 80

Consuming more protein may protect patients taking anti-obesity drug from muscle loss

Thyroid treatment may improve gut health in people with hypothyroidism

Combination of obesity medication tirzepatide and menopause hormone therapy fuels weight loss

High blood sugar may have a negative impact on men’s sexual health

Emotional health of parents tied to well-being of children with growth hormone deficiency

Oxytocin may reduce mood changes in women with disrupted sleep

Mouse study finds tirzepatide slowed obesity-associated breast cancer growth

CMD-OPT model enables the discovery of a potent and selective RIPK2 inhibitor as preclinical candidate for the treatment of acute liver injury

Melatonin receptor 1a alleviates sleep fragmentation-aggravated testicular injury in T2DM by suppression of TAB1/TAK1 complex through FGFR1

Single-cell RNA sequencing reveals Shen-Bai-Jie-Du decoction retards colorectal tumorigenesis by regulating the TMEM131–TNF signaling pathway-mediated differentiation of immunosuppressive dendritic ce

Acta Pharmaceutica Sinica B Volume 15, Issue 7 Publishes

New research expands laser technology

Targeted radiation offers promise in patients with metastasized small cell lung cancer to the brain

A high clinically translatable strategy to anti-aging using hyaluronic acid and silk fibroin co-crosslinked hydrogels as dermal regenerative fillers

Mount Sinai researchers uncover differences in how males and females change their mind when reflecting on past mistakes

CTE and normal aging are difficult to distinguish, new study finds

Molecular arms race: How the genome defends itself against internal enemies

Tiny chip speeds up antibody mapping for faster vaccine design

KTU experts reveal why cultural heritage is important for community unity

More misfolded proteins than previously known may contribute to Alzheimer’s and dementia

“Too much going on”: Autistic adults overwhelmed by non-verbal social cues

What’s driving America’s deep freezes in a warming world?

A key role of brain protein in learning and memory is deciphered by scientists

Heart attacks don’t follow a Hollywood script

Erin M. Schuman wins 2026 Nakasone Award for discovery on neural synapse function and change during formation of memories

Global ocean analysis could replace costly in-situ sound speed profiles in seafloor positioning, study finds

[Press-News.org] New solar system formation models indicate that Jupiter's foray robbed Mars of mass