Поиск  Пользователи  Правила 
Забыли свой пароль?
Страницы: Пред. 1 ... 16 17 18 19 20 ... 23 След.
NASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 56 мин. назад

3D-printed versions of the old and new shape models for #asteroid Bennu show how accurate the early, ground-based model actually was. Bennu’s size, shape, spin rate and orientation are all very close to what the team predicted. #WelcomeToBennu #AGU18

NASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 59 мин. назад

My close-range images of Bennu are beginning to reveal geological features on the asteroid’s surface, such as boulders and craters. Bennu has some rugged terrain to explore. #WelcomeToBennu #AGU18

57 мин. назад

On Dec. 2 at a range of 15 miles (24 km), PolyCam snapped this image showing three different boulder features on Bennu, each circled in white and then magnified. Their widths are about 52 feet (16 m), 115 feet (35 m), and 102 feet (31 m), respectively. #WelcomeToBennu #AGU18

Скрытый текст

55 мин. назад

My team is keeping an eye out for areas on Bennu with loose rock and dirt that are potential places to collect a sample. On Dec. 2, PolyCam imaged this crater, which is about 66 feet (20 m) across and appears to have loose material in the bottom. #WelcomeToBennu #AGU18

Скрытый текст
NASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 55 мин. назад

Early data fr om Bennu show that I’m exactly wh ere I need to be to achieve our science goals. The biggest surprise so far is the number and size of boulders on Bennu’s surface, but my team is more than ready to tackle that challenge. Let the adventure begin! #WelcomeToBennu #AGU18

NASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 36 мин.36 минут назад

Beautiful new shape model of Bennu?
Water bound up in the clay minerals on the asteroid's surface?
Awesome new imagery showing its rugged terrain?

Read more about the discoveries my team has made about Bennu so far: http://bit.ly/BennuSci #WelcomeToBennu #AGU18

Загрузка плеера

NASA’s Newly Arrived OSIRIS-REx Spacecraft Already Discovers Water on Asteroid

December 10, 2018 - Recently analyzed data fr om NASA’s Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer (OSIRIS-REx) mission has revealed water locked inside the clays that make up its scientific target, the asteroid Bennu.

This mosaic image of asteroid Bennu is composed of 12 PolyCam images collected on Dec. 2 by the OSIRIS-REx spacecraft from a range of 15 miles (24 km).
Credit: NASA/Goddard/University of Arizona

During the mission’s approach phase, between mid-August and early December, the spacecraft traveled 1.4 million miles (2.2 million km) on its journey from Earth to arrive at a location 12 miles (19 km) from Bennu on Dec. 3. During this time, the science team on Earth aimed three of the spacecraft’s instruments towards Bennu and began making the mission’s first scientific observations of the asteroid. OSIRIS-REx is NASA’s first asteroid sample return mission.

Data obtained from the spacecraft’s two spectrometers, the OSIRIS-REx Visible and Infrared Spectrometer (OVIRS) and the OSIRIS-REx Thermal Emission Spectrometer (OTES), reveal the presence of molecules that contain oxygen and hydrogen atoms bonded together, known as “hydroxyls.” The team suspects that these hydroxyl groups exist globally across the asteroid in water-bearing clay minerals, meaning that at some point, Bennu’s rocky material interacted with water. While Bennu itself is too small to have ever hosted liquid water, the finding does indicate that liquid water was present at some time on Bennu’s parent body, a much larger asteroid.
Скрытый текст
Chris B - NSF‏ @NASASpaceflight 7 мин. назад

OSIRIS-REx finds water on asteroid Bennu -


- By Chris Gebhardt (@ChrisG_NSF)

Скрытый текст
11 ДЕК, 01:04
Аппарат OSIRIS-REx нашел на астероиде Бенну следы воды

Речь идет о "гидросодержащих минералах", отметили в NASA

Зонд OSIRIS-REx у астероида Бенну
© NASA/Goddard/University of Arizona via AP

ВАШИНГТОН, 11 декабря. /ТАСС/. Космический аппарат OSIRIS-REx обнаружил следы воды на исследуемом им астероиде Бенну. Об этом сообщило в понедельник Национальное управление США по аэронавтике и исследованию космического пространства (NASA).

Речь идет о "гидросодержащих минералах", уточнила научный сотрудник Центра космических полетов имени Годдарда в Гринбелте (штат Мэриленд) Эми Саймон. Это учреждение входит в структуру NASA и вместе с еще несколькими американскими научными центрами занимается реализацией проекта OSIRIS-REx. Как отметило NASA, о том, что на астероиде Бенну есть вода, свидетельствуют "данные, собранные двумя спектрометрами" автоматической станции OSIRIS-REx. Эти приборы выявили наличие на астероиде гидроксилов, или водных остатков, заявило американское космическое ведомство.

По его свидетельству, специалисты, привлеченные к поддержке миссии аппарата OSIRIS-REx, подозревают, что гидроксилы имеются на астероиде Бенну повсюду. Это означает, что, вероятно, когда-то в прошлом вода присутствовала на том более крупном астрономическом объекте, от которого откололся астероид Бенну, пояснило NASA. Его эксперты подчеркнули, что в силу малых размеров астероида Бенну на нем самом воды в жидком виде не было.

О проекте
Скрытый текст
... Тот случай, когда последнее слово всё портит.
LIVE – NASA’s Welcome to Bennu press conference

Canadian Space Agency

Прямой эфир: 10 дек. 2018 г.
Загрузка плеера
Welcome to Bennu Press Conference - First Mission Science Results

OSIRIS-REx Mission

Опубликовано: 12 дек. 2018 г.

At the AGU Fall 2018 meeting, members of the OSIRIS-REx science team shared highlights of their initial up-close studies of the asteroid. Highlights include: detection of water bound up in the clay minerals on the asteroid's surface, a new shape model, and new high-resolution images.
Загрузка плеера

Bennu North Pole Flyover

This series of MapCam images was taken over the course of about four hours and 19 minutes on Dec. 4, 2018, as OSIRIS-REx made its first pass over Bennu’s north pole. The images were captured as the spacecraft was inbound toward Bennu, shortly before its closest approach of the asteroid’s pole. As the asteroid rotates and grows larger in the field of view, the range to the center of Bennu shrinks from about 7.1 to 5.8 miles (11.4 to 9.3 km).

This first pass was one of five flyovers of Bennu’s poles and equator that OSIRIS-REx conducted during its Preliminary Survey of the asteroid.

Date Taken: Dec. 4, 2018

Instrument Used: OCAMS (MapCam)

Credit: NASA/Goddard/University of Arizona
NASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 23 дек.

Bennu's small size (~500 m or 1,600 ft in diameter) and low gravity make navigating around the asteroid very challenging. In fact, Bennu will become the smallest planetary object ever orbited by a spacecraft when I begin orbiting it for the first time on Dec. 31. #NYE2019

Science in Seconds: OSIRIS-REx & New Horizons

OSIRIS-REx Mission

Опубликовано: 23 дек. 2018 г.

Two missions. Two small worlds. Untold discoveries await. As 2018 draws to close, NASA's OSIRIS-REx and New Horizons missions are exploring two never-before-visited small bodies: asteroid Bennu and Kuiper belt object Ultima Thule.
Загрузка плеера
NASA's OSIRIS-REx‏Подлинная учетная запись @OSIRISREx 59 мин. назад

Big milestone coming up! On #NYE19,when I go into orbit around Bennu, I'll break two records: the smallest body ever orbited by a spacecraft and the closest orbit of a planetary body by any spacecraft. For updates, follow @UALPL and keep an eye on http://asteroidmission.org

Ответ к #354

KinetX SNAFD‏ @KinetXSNAFD 4 ч. назад

Today our #orexnav team is finalizing the parameters for tomorrow’s orbit insertion burn!
KinetX SNAFD‏ @KinetXSNAFD 17 мин. назад

@OSIRISREx has now crossed closer to Bennu than ever before: 4.4 miles (7km) and closing on orbit insertion target.

CanberraDSN‏Подлинная учетная запись @CanberraDSN 30 мин. назад

Great way to end one year and start another.

Tonight #NYE2019, @NASA's @OSIRISREx spacecraft enters orbit at asteroid #Bennu

Then on New Year's Day, @NASANewHorizons aka @NewHorizons2015 makes its historic #UltimaFlyby of #KuiperBelt object #2014MU69 aka #UltimaThule.

KinetX SNAFD‏ @KinetXSNAFD 6 ч. назад

Orbit insertion burn design has been finalized: @OSIRISREx will fire its thrusters to enter orbit about Bennu at 19:43:55 UTC (14:43:55 EST) tomorrow, December 31st! The engines will burn for 8 seconds.

Загрузка плеера
Arrival at Asteroid Bennu

OSIRIS-REx Mission

Опубликовано: 29 дек. 2018 г.

On Dec. 3, 2018, the OSIRIS-REx spacecraft arrived at its destination: an ancient near-Earth asteroid called Bennu. Members of the mission team reflect on what we will learn by collecting a sample from Bennu, the milestones the mission has reached so far, and the challenges ahead.

Credit: NASA's Goddard Space Flight Center
Загрузка плеера
OSIRIS-REx ready for New Year’s Eve orbit insertion burn at asteroid
December 31, 2018 | Stephen Clark

This mosaic image of asteroid Bennu is composed of 12 PolyCam images collected on Dec. 2 by the OSIRIS-REx spacecraft fr om a range of 15 miles (24 kilometers). Credits: NASA/Goddard/University of Arizona

After four weeks of navigating in the vicinity of asteroid Bennu, NASA’s OSIRIS-REx spacecraft is set to fire its thrusters for eight seconds Monday to slip into orbit around the carbon-rich object, making Bennu the smallest planetary body ever orbited by a spacecraft.

OSIRIS-REx arrived at Bennu on Dec. 3, ending a journey fr om Earth that lasted more than two years and spanned 1.2 billion miles (2 billion kilometers). Since then, the robotic spacecraft has surveyed the 1,600-foot-wide (492-meter) asteroid through a series of flybys as close as 4.4 miles (7 kilometers) over Bennu’s north pole, south pole and equator to measure the asteroid’s gravitational tug on OSIRIS-REx, which will help scientists determine the object’s mass.

The mass estimate helped navigators refine the parameters of OSIRIS-REx’s maneuver to enter orbit around Bennu. The craft’s thrusters will ignite for 8 seconds at 2:43:55 p.m. EST (1943:55 GMT) Monday to slightly adjust OSIRIS-REx’s velocity, nudging it just enough for Bennu’s tenuous gravity to capture the probe into orbit.

Launched in September 2016, NASA’s $1 billion Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer was built to travel to Bennu and collect samples for return to Earth.

When the solar system formed more than 4.5 billion years ago, chunks of rock and ice collided as they circled the sun like the balls on a billiard table, eventually building up planets. The leftovers became asteroids and comets, and scientists believe Bennu still harbors the basic carbon-bearing organic molecules that were present in the early solar solar system, the stuff that may have helped seed life.

The spacecraft carries three cameras — one for long-range viewing, a color camera for mapping, and another imager to take pictures as OSIRIS-REx collects samples from the asteroid’s surface. The rest of OSIRIS-REx’s suite of science instruments includes a thermal emission spectrometer to detect heat coming from the asteroid, a visible infrared spectrometer to locate minerals and organic materials, a laser altimeter provided by the Canadian Space Agency to create topographic maps, and a student-built X-ray spectrometer to identify individual chemical elements present on the asteroid.

Besides revealing Bennu with high-resolution images, OSIRIS-REx has already made discoveries at the asteroid.

Data gathered by thermal emission and visible infrared spectrometer instruments — OTES and OVIRS — indicates clay minerals on the asteroid’s surface contain hydroxyl molecules with oxygen and hydrogen molecules bonded together. This finding suggests Bennu’s surface was once in contact with water, likely when the asteroid was part of a much larger parent body that was smashed to bits in a collision in the chaotic early solar system.
Скрытый текст
Страницы: Пред. 1 ... 16 17 18 19 20 ... 23 След.
Читают тему (гостей: 1)
Журнал Новости Форум Фото Подписка Рекламодателям Контакты