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Pronađena voda na Marsu

Wed, 25 Jul 2018 21:49:15 +0000

Hm. Da li je za verovati ovakvim vestima? Šta vi mislite?

Liquid water 'lake' revealed on Mars

Researchers have found evidence of an existing body of liquid water on Mars.

What they believe to be a lake sits under the planet's south polar ice cap, and is about 20km (12 miles) across.

Previous research found possible signs of intermittent liquid water flowing on the martian surface, but this is the first sign of a persistent body of water on the planet in the present day.

Lake beds like those explored by Nasa's Curiosity rover show water was present on the surface of Mars in the past.

However, the planet's climate has since cooled due to its thin atmosphere, leaving most of its water locked up in ice.

The result is exciting because scientists have long searched for signs of present-day liquid water on Mars, but these have come up empty or yielded ambiguous findings. It will also interest those studying the possibilities for life beyond Earth - though it does not yet raise the stakes in the search for biology.

The discovery was made using Marsis, a radar instrument on board the European Space Agency's (Esa) Mars Express orbiter.

Izvor: https://www.bbc.com/news/science-environment-44952710

Asteroidi snimljeni iz blizine

Wed, 22 Aug 2018 21:20:27 +0000

do sada je bilo dosta sjajnih svemirskih misija koje su nam omogucile da snimimo asteroide iz blizine. prva takva misija je bila sa cuvenom sondom galileo, koja je 6 godina putovala od zemlje do planete jupiter, njen primarni zadatak je bio da udje u orbitu oko jupitera i da tom prilikom odbaci jedan mali modul koji se spustao padobranom u atmosferu jupitera. prilikom samog putovanja do jupitera, sonda je usput prosla pored dva asteroida koji su bili usput,.

prvi asteroid se zove GASPRA, letjelica galileo je pored gaspre prosla u oktobru 1991 godine na samo 1600 km udaljenosti, to je bilo prvi puta u istoriji da su ljudi mogli pogledati kako izgleda jedan asteroid izbliza

dve godine kasnije galileo na svom putu prema jupiteru prolazi pored asteroida IDA, kod tog asteroida je vrlo zanimljivo bilo sto su snimili njegov mjesec , tj. prirodni satelit koji se zove DAKTIL, to je mali satelit koji je sirok svega 1,5 km, dok je sama ida velika nekih 60 km.

na ovoj maloj slici vidimo sekvencu priblizavanja letjelice galileo asteroidu ida.

inace interesantno je sto na povrsini ovog asteroida postoji regija koja se zove pulska regija, zato sto je ovaj asteroid otkriven iz zvjezdarnice u puli za vreme austrougarske.

Svet će videti najsjajniju kometu, uskoro prolazi pored Zemlje

Thu, 06 Dec 2018 12:32:53 +0000

Najsjajnija kometa, nazvana "46P/Wirtanen" proći će naredne nedelje pored Zemlje i to će biti jedan od 10 najbližih susreta sa takvom vrstom nebeskog tela od 1950. godine, i među 20 najbližih od 9. veka.

Kako navodi "Ju-Es-Ej tudej" (USA Today), kometa će biti najbliža Suncu naredne srede, 12. decembra, a Zemlji 16. decembra i projuriće pored naše planete na udaljenosti od 11.265.408 kilometara.

Kako se navodi, kometa će najverovatnije moći da se vidi golim okom, ali najbolje bi bilo da se gleda kroz dvoglede i male teleskope, naročito izvan gradova.

S obzirom na to da će kometa nekoliko nedelja prolaziti pored Zemlje, naučnici NASA imaće priliku detaljno da je proučavaju.

Odeljenje za astronomiju Univerziteta u Mičigenu saopštilo je da "nema šanse da kometa pogodi Zemlju".

Izvor: B92

Ja se iskreno nadam da će 16. Decembra nebo biti vedro ?

MINERVA-II1: Successful image capture

Sat, 22 Sep 2018 20:13:15 +0000

MINERVA-II1: Successful image capture,
landing on Ryugu and hop!

On September 21, the small compact MINERVA-II1 rovers separated from the Hayabusa2 spacecraft (time of separation was 13:06 JST). The MINERVA-II1 consists of two rovers, Rover-1A and Rover-1B. We have confirmed both rovers landed on the surface of asteroid Ryugu. The two rovers are in good condition and are transmitting images and data. Analysis of this information confirmed that at least one of the rovers is moving on the asteroid surface.

MINERVA-II1 is the world’s first rover (mobile exploration robot) to land on the surface of an asteroid. This is also the first time for autonomous movement and picture capture on an asteroid surface. MINERVA-II1 is therefore “the world’s first man-made object to explore movement on an asteroid surface”. We are also delighted that the two rovers both achieved this operation at the same time.

The following is a picture sent from MINERVA-II1

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Figure 1: Image captured by Rover-1A on September 21 at around 13:08 JST. This is a color image taken immediately after separation from the spacecraft. Hayabusa2 is at the top and the surface of Ryugu is bottom. The image is blurred because the shot was taken while the rover was rotating.

(Image credit: JAXA)

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Figure 2: Image captured by Rover-1B on September 21 at around 13:07 JST. This color image was taken immediately after separation from the spacecraft. The surface of Ryugu is in the lower right. The coloured blur in the top left is due to the reflection of sunlight when the image was taken.
(Image credit: JAXA)

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Figure 3: Image captured by Rover-1A on September 22 at around 11:44 JST. Color image captured while moving (during a hop) on the surface of Ryugu. The left-half of the image is the asteroid surface. The bright white region is due to sunlight.
(Image credit: JAXA).

The MINERVA-II1 cameras can shoot in color. In Figure 1, although the image is blurred due to the rover rotating, you can clearly see the body of Hayabusa2 and the paddle of the solar cells. The solar paddle appears blue. In Figure 3, the image was taken during a hop on the surface and you can feel this dynamic movement.

Operation of MINERVA-II1 will continue from now on. We are planning to acquire more data for analysis.

Comments from Project Members

■ Tetsuo Yoshimitsu, Responsible for the Hayabusa2 Project MINERVA-II1.
Although I was disappointed with the blurred image that first came from the rover, it was good to be able to capture this shot as it was recorded by the rover as the Hayabusa2 spacecraft is shown. Moreover, with the image taken during the hop on the asteroid surface, I was able to confirm the effectiveness of this movement mechanism on the small celestial body and see the result of many years of research.

■ Takashi Kubota, Spokesperson for the Hayabusa2 Project (also responsible for the MINERVA-II1)
The good news made me so happy. From the surface of Ryugu, MINERVA-II1 sent a radio signal to the ground station via Hayabusa2 S/C. The image taken by MINERVA-II1 during a hop allowed me to relax as a dream of many years came true. I felt awed by what we had achieved in Japan. This is just a real charm of deep space exploration.

■ Yuichi Tsuda, Hayabusa2 Project Project Manager
I cannot find words to express how happy I am that we were able to realize mobile exploration on the surface of an asteroid. I am proud that Hayabusa2 was able to contribute to the creation of this technology for a new method of space exploration by surface movement on small bodies.

■ Makoto Yoshikawa, Hayabusa2 Project Mission Manager
I was so moved to see these small rovers successfully explore an asteroid surface because we could not achieve this at the time of Hayabusa, 13 years ago. I was particularly impressed with the images taken from close range on the asteroid surface.

Hayabusa2 project
2018.09.22

Izvor

Pomračenje Meseca 27. jul 2018

Thu, 26 Jul 2018 19:06:00 +0000

Totalno pomračenje Meseca – 27. jul 2018

Za ovu nedelju nebeska mehanika “pripremila” je totalno pomračenje Meseca, i to najduže u ovom veku. Pomračenje počinje 27. jula u 19:14 h po našem vremenu i trajaće sve do subote u 1:28 h. Totalno pomračenje Meseca počinje u 21:30 h i trajaće do 23:13 h. Maksimu pomračenja nastupiće u 22:21 h, a tada će se Mesec nalaziti otprilike u pravcu juga/jugoistoka.

Više na: svetnauke.org

Nadam se da će sutra uveče biti vedro nebo.