adplus-dvertising
Connect with us

Science

Osiris-Rex: Nasa asteroid mission confident of success – BBC News

Published

 on



.css-94m6rd-HeadingWrapperborder-bottom:solid 1px #BABABA;padding-bottom:1.5rem;.css-94m6rd-HeadingWrapper > *:not([hidden]):not(style) ~ *:not([hidden]):not(style)margin-top:1rem;

.css-1c1994u-StyledHeadingfont-family:ReithSerif,Helvetica,Arial,freesans,sans-serif;font-weight:500;font-size:2rem;line-height:2.25rem;color:#3F3F42;@media (min-width:37.5rem).css-1c1994u-StyledHeadingfont-size:2.75rem;line-height:3rem;.css-1c1994u-StyledHeading:focusoutline-style:none;.css-1c1994u-StyledHeading:focus-visibleoutline-style:auto;

Osiris-Rex: Nasa asteroid mission confident of success

.css-15hnagr-Contributorfont-family:ReithSans,Helvetica,Arial,freesans,sans-serif;font-weight:400;font-size:0.8125rem;line-height:1rem;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;color:#696969;.css-15hnagr-Contributor strongfont-family:ReithSerif,Helvetica,Arial,freesans,sans-serif;font-weight:500;color:#3F3F42;

By Jonathan Amos
BBC Science Correspondent

300x250x1
.css-11c8au8-MetadataStripfont-family:ReithSans,Helvetica,Arial,freesans,sans-serif;font-weight:400;font-size:0.8125rem;line-height:1rem;margin-top:-0.25rem;color:#696969;

.css-8d0yke-MetadataStripItemdisplay:inline-block;white-space:nowrap;margin-top:0.25rem;max-width:calc(100% – 1em);.css-8d0yke-MetadataStripItem::aftercontent:”;display:inline-block;height:1.25em;border-left:#BABABA 1px solid;margin:0 0.5em;vertical-align:-0.25em;.css-8d0yke-MetadataStripItem:last-childmax-width:100%;.css-8d0yke-MetadataStripItem:last-child::aftercontent:none;

Published

.css-1n98t8y-MetadataContentdisplay:inline-block;max-width:100%;

.css-1hizfh0-MetadataSnippetdisplay:inline-block;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;vertical-align:bottom;.css-1n712b9-IconContainerdisplay:inline-block;width:1em;height:1em;vertical-align:-0.125em;padding-right:0.25em;duration1 hour ago

.css-r83t2i-ComponentWrappermargin:1.5rem 0;

.css-1759m9z-StyledFigurefont-family:ReithSans,Helvetica,Arial,freesans,sans-serif;font-weight:400;font-size:0.875rem;line-height:1.125rem;

.css-kwaqyc-StyledFigureContainerposition:relative;

.css-bhez6r-Containerbackground-color:#000000;height:0;padding-bottom:56.25%;width:100%;

.css-1rnnz6t-StyledFigureCaptionbackground:#3F3F42;color:#EEEEEE;padding:1rem;

.css-uf6wea-RichTextComponentWrappermargin:1rem 0;max-width:36.25rem;

.css-83cqas-RichTextContainercolor:#3F3F42;.css-83cqas-RichTextContainer > *:not([hidden]):not(style) ~ *:not([hidden]):not(style)margin-top:1rem;

.css-14iz86j-BoldTextfont-weight:bold;“We really did kind of make a mess.”

That was Dante Lauretta’s take after reviewing the first pictures to come down from .css-yidnqd-InlineLink:linkcolor:#3F3F42;.css-yidnqd-InlineLink:visitedcolor:#696969;.css-yidnqd-InlineLink:link,.css-yidnqd-InlineLink:visitedfont-weight:bolder;border-bottom:1px solid #BABABA;-webkit-text-decoration:none;text-decoration:none;.css-yidnqd-InlineLink:link:hover,.css-yidnqd-InlineLink:visited:hover,.css-yidnqd-InlineLink:link:focus,.css-yidnqd-InlineLink:visited:focusborder-bottom-color:currentcolor;border-bottom-width:2px;color:#B80000;@supports (text-underline-offset:0.25em).css-yidnqd-InlineLink:link,.css-yidnqd-InlineLink:visitedborder-bottom:none;-webkit-text-decoration:underline #BABABA;text-decoration:underline #BABABA;-webkit-text-decoration-thickness:1px;text-decoration-thickness:1px;-webkit-text-decoration-skip-ink:none;text-decoration-skip-ink:none;text-underline-offset:0.25em;.css-yidnqd-InlineLink:link:hover,.css-yidnqd-InlineLink:visited:hover,.css-yidnqd-InlineLink:link:focus,.css-yidnqd-InlineLink:visited:focus-webkit-text-decoration-color:currentcolor;text-decoration-color:currentcolor;-webkit-text-decoration-thickness:2px;text-decoration-thickness:2px;color:#B80000;Nasa’s Osiris-Rex probe following its bid to grab a sample from asteroid Bennu on Tuesday.

Dust and grit flew in all directions but that was good news, enthused the University of Arizona professor.

“Everything that we can see from these initial images indicates sampling success. So in case you can’t tell, I’m pretty excited.”

The principal investigator’s team now has to work out precisely how much material Osiris-Rex might have lifted from the surface of 500m-wide Bennu.

.css-1pzprxn-BulletListContainermargin-left:1.5rem;.css-1pzprxn-BulletListContainer *:not([hidden]):not(style) ~ *:not([hidden]):not(style)margin-top:1rem;.css-1pzprxn-BulletListContainer ullist-style-type:disc;.css-1pzprxn-BulletListContainer ollist-style-type:decimal;

If it’s a kilo or more, it would represent the biggest extra-terrestrial sample cache since the Apollo astronauts gathered rocks from the Moon some 50 years ago.

But even a smaller amount would still be a great prize.

Bennu is a very primitive object, with chemistry preserved from the dawn of the Solar System more than 4.5 billion years ago. As such, it can tell us a great deal about how the Sun and the planets came into being.

Osiris-Rex used what had been described as a “reverse vacuum cleaner” to acquire its clutch of “soil”.

More properly called the Touch-and-Go Sample Acquisition Mechanism, or Tag-Sam, this device comprised a long boom with a ring-shaped collection chamber on the end.

The idea was to deliver a squirt of nitrogen when the Tag-Sam made contact with the asteroid.

The hope was this gas would stir up Bennu’s fragmented surface, leading to a considerable number of rocky pieces getting trapped inside the collection chamber.

.css-1623y3z-Placeholderposition:relative;display:block;padding-bottom:100.30737704918033%;background-color:#EEEEEE;.css-1623y3z-Placeholder imgoverflow:hidden;position:absolute;top:0;right:0;bottom:0;left:0;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-pack:center;justify-content:center;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;width:100%;height:100%;object-fit:cover;

.css-evoj7m-Imagedisplay:block;width:100%;height:auto;

.css-1ecljvk-StyledFigureCopyrightposition:absolute;bottom:0;right:0;background:#3F3F42;color:#EEEEEE;padding:0.25rem 0.5rem;text-transform:uppercase;image copyrightNASA/Goddard/UoA

.css-1ix1qms-Placeholderposition:relative;display:block;padding-bottom:0.16025641025641024%;background-color:#EEEEEE;.css-1ix1qms-Placeholder imgoverflow:hidden;position:absolute;top:0;right:0;bottom:0;left:0;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-pack:center;justify-content:center;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;width:100%;height:100%;object-fit:cover;

Presentational white space

The downlinked pictures certainly suggested the strategy was the right one.

Osiris-Rex may have been in contact with Bennu for only six seconds before retreating, but the sampling ring was flat and stable, and even pressing into the soil slightly. This should have maximised the chances of retaining material.

Rich Burns, Nasa’s project manager on the mission, lauded the the way his team managed to put the probe in just the right place on Bennu – almost exactly at the centre of the targeted sampling zone.

“We’re over 320 million km away from Earth at this point, and we touched this asteroid within a metre of where we intended to. So that’s extraordinary and a real credit to our team,” he told reporters.

.css-1xtcmof-Placeholderposition:relative;display:block;padding-bottom:56.25%;background-color:#EEEEEE;.css-1xtcmof-Placeholder imgoverflow:hidden;position:absolute;top:0;right:0;bottom:0;left:0;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-pack:center;justify-content:center;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;width:100%;height:100%;object-fit:cover;

Artwork of probe

image copyrightNASA/Goddard/UoA

On Thursday, engineers will command the spacecraft to take detailed pictures of the sampling ring to try to see what it contains.

And then on Saturday, they’ll make Osiris-Rex spin itself around with the Tag-Sam outstretched. Any extra mass on board will change the level of torque required to turn the probe, compared with the level that was needed to perform the same rotation exercise prior to sample acquisition.

“We are expecting a final sample mass measurement report on Monday,” explained Sandy Freund, the mission operations manager at Lockheed Martin, the company that manufactured Osiris-Rex.

It seems highly likely that Osiris-Rex has achieved its objective of taking at least 60g off Bennu. But if it hasn’t, there are two more nitrogen bottles still aboard the probe to facilitate further sampling bids. And there’s plenty of time, too.

The spacecraft is not scheduled to depart Bennu for Earth until April next year. A landing on Earth for any rock cache in this timeline would be late 2023.

Presentational white space

Prof Lauretta once again on Wednesday’s paid tribute to the British scientist who conceived Osiris-Rex.

This was Bristol-born Michael Drake who held senior science positions at the University of Arizona in Tucson.

He worked up the concept for the mission but sadly died in 2011, aged 65, just months after Nasa had green-lit the project.

“I’m pleased to see that my dad’s legacy is being honoured at this exciting time in Osiris-Rex’s mission,” Michael Drake’s son, Matt Drake, told BBC News.

“My father’s idea to study near-Earth asteroids as a means of peering back in time to the birth of the Solar System finally came to fruition during [Tuesday’s] Tag event.

“As the principal investigator of this team from its inception until his passing almost 10 years later, he would have been incredibly proud of his team’s accomplishments.”

Osiris-Rex carries a plaque of remembrance to Michael Drake.

.css-4lxdld-Placeholderposition:relative;display:block;padding-bottom:66.59836065573771%;background-color:#EEEEEE;.css-4lxdld-Placeholder imgoverflow:hidden;position:absolute;top:0;right:0;bottom:0;left:0;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-pack:center;justify-content:center;-webkit-align-items:center;-webkit-box-align:center;-ms-flex-align:center;align-items:center;width:100%;height:100%;object-fit:cover;

Michael Drake

image copyrightUoA

Bennu size comparison with Empire State Building

Jonathan.Amos-INTERNET@bbc.co.uk and follow me on Twitter: @BBCAmos

Let’s block ads! (Why?)

728x90x4

Source link

Continue Reading

Science

New England College of Optometry Issues Safety Advisory for Solar Eclipse – New England College of Optometry

Published

 on


NECO Issues Safety Advisory for Solar Eclipse – New England College of Optometry


Watching the celestial event safely is possible with the right equipment and some preparation.

With the upcoming total solar eclipse on April 8, 2024, the New England College of Optometry (NECO) urges the general public to observe this celestial phenomenon safely. Solar eclipses are rare events that spark widespread interest and excitement. To ensure everyone can enjoy the eclipse without risking their vision, NECO is sharing crucial guidelines for proper viewing.  

“Solar eclipses present a wonderful opportunity for communities to engage with astronomy, but it’s vital that safety is a  priority,” says George Asimellis, PhD, Msc, MBA, Professor of Vision Science at NECO. “Viewing a solar eclipse without appropriate protection can result in solar retinopathy, which can cause lasting damage to the eyes. You must take proper precautions to view the eclipse.” PLEASE NOTE: NECO recommends that individuals who have recently undergone eye surgery or who have chronic eye conditions should refrain from viewing the eclipse. 

Student helps patient pick glasses frame

To prevent eye injuries and ensure a memorable experience, NECO advises the following: 

  • Always use solar viewing glasses. “When gearing up to watch the magical solar eclipse, it’s important to use specialized solar filters known as ‘eclipse glasses,’” says Alina Reznik, OD ’16, NECO Alumni Liaison. “These viewers adhere to the international safety standard ISO 12312-2 for safe viewing.” The ISO certification should be visible somewhere on the product. Ordinary sunglasses, even those with UV protection, are NOT safe for looking directly at the sun. They transmit thousands of times too much sunlight to be used for solar viewing.
  • If you wish to capture the event, do not look at the sun through camera viewfinders or phone cameras, as this can also lead to serious eye damage and can even destroy a phone. 
  • The safest way to view the eclipse is to create a camera obscura by finding a piece of cardboard and piercing a small hole in the center. With your back to the sun, hold the cardboard at shoulder height. In your other hand, hold a sheet of paper and align it with the cardboard until you see a tiny image of the sun projected onto the surface of the paper. You can even put cardboard around the “screen” to block out ambient light and see the eclipse image more clearly.

NECO will host an eclipse viewing party on Monday, April 8, from 2:00-4:00pm at their main campus located at 424 Beacon Street in Boston’s Back Bay. Media are welcome to attend and receive a free pair of eclipse viewing glasses. Faculty will be present to talk about the science behind safely viewing an eclipse.

The map below (courtesy of NASA) shows the eclipse’s path of totality.

For those who reside outside the path of totality: The Boston area is outside the eclipse’s path of totality. However, we will be able to view a partial eclipse starting at about 2:10pm. Our area will experience moderate darkness and a drop in temperature during the partial eclipse, which will last two hours. Eclipse glasses must still be used to protect  your eyes from the harmful rays of the sun, even during a partial eclipse!

Our vision experts are available for comment and additional information on eye care during this astronomical event. Please contact our Marketing Department by calling (617) 587-5609, or email [email protected].

For more information from national experts on the April 8 solar eclipse, visit NASA or the American Optometric Association.

Learn more about us.

Changing the way people see the world

Adblock test (Why?)

728x90x4

Source link

Continue Reading

Science

Global wildlife study during COVID-19 shows rural animals are more sensitive to human activity

Published

 on

Plant-eating animals more active, carnivores more cautious around humans 

One of the largest studies on wildlife activity—involving more than 220 researchers, 163 mammal species and 5,000 camera traps worldwide—reveals that wild animals react differently to humans depending on where the animals live and what they eat.

Bigger herbivores—plant-eating animals like deer or moose—tend to become more active when humans are around, while meat-eaters like wolves or wolverines tend to be less active, preferring to avoid risky encounters.

Urban animals like deer or raccoons may become more active around people, as they get used to human presence and find food like garbage or plants, which they can access at night. But animals living farther from cities and other developed areas are more wary of encountering people.

Wildlife during the pandemic ‘anthropause’

300x250x1

Dr. Cole Burton

The new study, a collaboration across researchers from 161 institutions, used data from before and during the COVID-19 lockdowns to examine wildlife behaviour amid changing human activity levels.

“COVID-19 mobility restrictions gave researchers a truly unique opportunity to study how animals responded when the number of people sharing their landscape changed drastically over a relatively short period,” said lead author Dr. Cole Burton, an associate professor of forest resources management at UBC and Canada Research Chair in Terrestrial Mammal Conservation.

“And contrary to the popular narratives that emerged around that time, we did not see an overall pattern of ‘wildlife running free’ while humans sheltered in place. Rather, we saw great variation in activity patterns of people and wildlife, with the most striking trends being that animal responses depended on landscape conditions and their position in the food chain.”

In Canada, researchers monitoring areas such as Banff and Pacific Rim national parks, Cathedral, Golden Ears and South Chilcotin Mountains provincial parks, and the Sea-to-Sky corridor in B.C. found that carnivores like wolverines, wolves and cougars were generally less active when human activity was higher.

In several of these parks, and in cities such as Edmonton, large herbivores often increased their activity but became more nocturnal with the presence of more humans. Large carnivores were notably absent from the most human-dominated landscapes.

A coyote warily investigating a camera trap in Malcolm Knapp Research
Forest, British Columbia, Canada. Photo credit: Dr. Cole Burton, UBC WildCo

Preventing conflict through smart conservation measures

These findings highlight the importance of measures to minimize any detrimental effects of human disturbance on wildlife, including reducing overlaps that might lead to conflict.

Dr. Kaitlyn Gaynor

“In remote areas with limited human infrastructure, the effects of our actual presence on wildlife may be particularly strong. To give wild animals the space they need, we may consider setting aside protected areas or movement corridors free of human activity, or consider seasonal restrictions, like temporary closures of campsites or hiking trails during migratory or breeding seasons,” said study co-author and UBC biologist Dr. Kaitlyn Gaynor.

She added that strategies must also fit specific species and locations. In more remote areas, keeping human activity low will be necessary to protect sensitive species. In areas where people and animals overlap more, such as cities, nighttime is an important refuge for wildlife, and keeping it that way can help species survive. Efforts may focus on reducing human-wildlife conflict after dark, such as more secure storage of trash bins to reduce the number of animals getting into human food sources, or use of road mitigation measures to reduce vehicle collisions.

The findings are particularly useful amid the surge in global travel and outdoor recreation post-pandemic, Dr. Burton added.

“Understanding how wildlife respond to human activity in various contexts helps us develop effective conservation plans that have local and global impact. For that reason, we are working to improve wildlife monitoring systems using tools like the camera traps that made it possible to observe animal behaviours during the pandemic.”

Adblock test (Why?)

728x90x4

Source link

Continue Reading

Science

Three Canadian Student CubeSats Set for ISS Launch

Published

 on

Longueuil, Quebec, – On , three CubeSats designed and built by Canadian students will launch to the International Space Station (ISS).This is the fourth and final launch of miniature satellites under the Canadian CubeSat Project. The teams finalized preparations of their CubeSats in at the Canadian Space Agency (CSA). The teams are:

  • QMSat – Université de Sherbrooke
  • Killick-1 – Memorial University
  • VIOLET – University of New Brunswick

Live coverage of the launch will air on NASA Live.

/Public Release. This material from the originating organization/author(s) might be of the point-in-time nature, and edited for clarity, style and length. Mirage.News does not take institutional positions or sides, and all views, positions, and conclusions expressed herein are solely those of the author(s).View in full here.

Adblock test (Why?)

728x90x4

Source link

300x250x1
Continue Reading

Trending