由买买提看人间百态

topics

全部话题 - 话题: orbits
1 2 3 4 5 6 7 8 9 10 下页 末页 (共10页)
w*******y
发帖数: 60932
1
www.bedeals.com:
http://www.bedeals.com
Small in size, big on sound, the Altec Lansing Orbit USB IML237 Laptop
Speaker gives your laptop the speaker its always deserved. Powered by your
USB port, the ultra-portable Altec Lansing Orbit USB IML237 Laptop Speaker
unleashes your sound wherever its needed. With audio alignment technology
the Orbit dishes out astonishing volume, clarity and depth. Built to survive
, this tough little speaker can travel the distance. When finished, the
Altec Lansing Or... 阅读全帖
w*******y
发帖数: 60932
2
TODAY ONLY: Altec Lansing Orbit IM207N Portable Speaker System for MP3
players, Smartphones $6.99 + $2 S&H:
http://www.all4cellular.com/altec-lansing-orbit-im207np.html
Features:
Ultra-portable speaker system for iPod and other MP3 players
Sound clarity with depth: Excellent musicality is powered by acoustic
tayloring.
Long battery life: Plays for up to 24 hours on 3 AAA batteries.
Shock-resistant: The rugged Orbit is durable enough for the most
intrepid traveler.
Personal co... 阅读全帖
Z**R
发帖数: 1233
3
【 以下文字转载自 Military 讨论区 】
发信人: ZZGR (闲逛), 信区: Military
标 题: ISRO:Chandrayaan-1’s Orbit Closer to Moon
发信站: BBS 未名空间站 (Wed Oct 29 09:09:00 2008)
October 29, 2008


The fourth orbit raising manoeuvre of Chandrayaan-1 spacecraft was carried
out today (October 29, 2008) morning at 07:38 am IST. During this manoeuvre,
the spacecraft’s 440 Newton liquid engine was fired for about three
minutes. With this, Chandrayaan-1 entered into a more elliptical orbit whose
apogee (farthest point to Earth)
Z**R
发帖数: 1233
4
By K. S. Jayaraman
Space News Correspondent
posted: 5 November 2008
12:52 pm ET
BANGALORE, India - India's Chandrayaan-1 lunar orbiter has successfully
tested a vital camera and performed an orbit-raising maneuver that puts it
on course to reach the moon by this weekend.
The Indian Space Research Organisation (ISRO) said Tuesday that Chandrayaan-
1, the country's first-ever moon probe, entered its lunar transfer
trajectory after a fifth and final orbit-raising maneuver carried out early
that day
T**********e
发帖数: 29576
5
再用refurbished老毛子发动机估计上不起保险了。
http://nextbigfuture.com/2014/11/orbital-science-might-turn-to-
Orbital Science might turn to Spacex to Fulfill NASA Space Station Contracts
Z**R
发帖数: 1233
6
【 以下文字转载自 Military 讨论区 】
发信人: yizishi (废话要多说), 信区: Military
标 题: Chandrayaan-1 Successfully Enters Lunar Orbit
发信站: BBS 未名空间站 (Sat Nov 8 09:00:51 2008)
Chandrayaan-1, India’s first unmanned spacecraft mission to moon, entered
lunar
orbit today (November 8, 2008). This is the first time that an Indian built
spacecraft has broken away from the Earth’s gravitational field and reached
the
moon. This historic event occurred following the firing of Chandrayaan-1
spacecraft’s liquid engine at 16:51 I
Z**R
发帖数: 1233
7
【 以下文字转载自 Military 讨论区 】
发信人: ZZGR (闲逛), 信区: Military
标 题: [Space]Chinese Rocket Launches Satellite to Wrong Orbit
发信站: BBS 未名空间站 (Tue Sep 1 12:26:59 2009, 美东)
By Stephen Clark
posted: 31 August 2009
10:31 pm ET
Breaking a 13-year streak of successful launches, a Chinese Long March
rocket failed to deliver an Indonesian communications satellite to its
planned orbit Monday.
Carrying the Palapa D telecommunications satellite, a Long March 3B rocket
blasted off from the Xichang launch base in sou
Z**R
发帖数: 1233
8
By K.S. Jayaraman
Space News Correspondent
posted: 29 August 2009
01:28 pm ET
BANGALORE, India — India's Chandrayaan-1 lunar orbiter mission, which
launched last October, ended 14 months prematurely Saturday after an abrupt
malfunction, the Indian Space Research Organisation (ISRO) said in a
statement.
ISRO said scientists abruptly lost radio contact with the nation's first
planetary probe, which was designed to operate for two years in orbit around
the Moon. ISRO spokesman S. Satish told Space
w*******y
发帖数: 60932
9
Ran across this at the local Home Depot. Orbit traveling yard sprinkler ~75
% off. It's not something I needed for my yard but maybe someone else could
use one. They also had a bunch of their lawn wattering accessories 75% off
. Mostly hose nozzels, some decorative sprinklers, and an electric timer
and some accessories that go with it (rain sensors) that you connect to your
water spigot.
Links to amazon for reference only.
Link:
http://www.amazon.com/Orbit-58322-Traveling-Sprinkler/dp/B000NJ
w*******y
发帖数: 60932
10
Orbit Mist Mango Surf Sugarfree Gum, 14-Piece Packs (Pack of 12):
http://www.amazon.com/Orbit-Mango-Sugarfree-14-Piece-Packs/dp/B0028C2BYG
Price: $8.44 ($0.56 / oz) & eligible for FREE Super Saver Shipping on
orders over $25
w*******y
发帖数: 60932
w*******y
发帖数: 60932
12
Link:
http://see.walmart.com/orbit/
see "special savings" on lower page to get to coupon. TWO PRINTS
CVS starting next week, 1/16:
Orbit gum 14 ct on sale Buy 1 get 1 Free w/CVS extra care card
Use the buy one get one free coupon (up to $1 value) found at link
Final cost possibly 4 packs for FREE (based on how much the gum retails for)
NEED TWO COUPONS FOR 4 PACKS!
t*******h
发帖数: 2882
13
来自主题: Military版 - In China's Orbit
http://online.wsj.com/article/SB10001424052748704104104575622531909154228.html?mod=WSJ_hpp_RIGHTTopCarousel_1#printMode
In China's Orbit
After 500 years of Western predominance, Niall Ferguson argues, the world is
tilting back to the East.
By NIALL FERGUSON
"We are the masters now." I wonder if President Barack Obama saw those words
in the thought bubble over the head of his Chinese counterpart, Hu Jintao,
at the G20 summit in Seoul last week. If the president was hoping for change
he could beli... 阅读全帖
a*****0
发帖数: 3319
14
请问random orbit sander Bosch ROS20VSK (HD sells) 和ROS20VSC (lowes sells)
有什么区别?多谢。
r********h
发帖数: 5638
15
找了一下,有manu coupon,所以可以倒赚
7/31SS $0.5/2,买两个用crt 可以倒转最少0.5
-----------------------------------------------------
这周大家应该都有orbit bogo crt
10/16, BOGO, use crt, so TWO free gums!
b******y
发帖数: 1609
16
脑子有点转不过来,下周拿两个orbit,用一个bogo crt,就可以oop free?
r********h
发帖数: 5638
17
嗯,这个crt很好,有onsale的orbit那就倒赚了,上回,我用,其中一个是$1.4好像是
,结果crt直接剪掉$1.7,不错,苍蝇肉也是肉 :)
r********h
发帖数: 5638
18
10/16那周,现在去刷卡,有效期可以到那周,那周是bogo sale,就是拿两个结帐,然
后递crt,两个都免费,我不知道有没有orbit manu coupon,如果有,就可以倒赚
G*******s
发帖数: 10605
19
【 以下文字转载自 SmartShopper 俱乐部 】
发信人: GoRockets (火箭加油), 信区: SmartShopper
标 题: Orbits 15% off hotel bookings, 20% off Las Vegas hotels
发信站: BBS 未名空间站 (Mon Dec 16 00:12:08 2013, 美东)
View the exclusive Orbitz available savings with this link. This will be
updated with upcoming coupons.
Save 15% on hotel stays CELEBRATE. Valid through Jan 8, 2014
Save 20% on Las Vegas hotels 48HRVEGAS. Valid Dec 16 - 18
http://userquote.com/forum/index.php?topic=2117.msg2472#msg2472
p**o
发帖数: 3409
20
来自主题: E-Sports版 - 2v2战术:地图High Orbit
High Orbit这个地图的特点就是二矿不好开,原则上不适合虫族打,但我还是挺喜欢这
张图的,尤其是跟T配合的时候。我一般让队友堵口,封侦查,然后内双暴狗(两个女
王都从主基地出),藏好。敌方等了一会儿不见动静,以为你在攀科技,往往忍不住自
作聪明地过来撬我方后门,不惊动他们,让他们撬,放他们进来一窝包掉(除非对方有
毒爆,要造地堡,或者优先手动点掉),然后提速狗直接反打,基地全R到对方家里源
源不断地产狗,同时左右两翼连拍两矿(感谢他们把我后门撬开了),队友再慢慢把坦
克开过去架脸上…… 很有意思,这个看似理想化的剧本已经上演很多次了。
现在天梯选手的纪律性越来越好了,后门岩石一般都会放水晶或房子预警,撬后门这种
事,很容易中全圈套……
另外,这个地图阴暗角落比较多,要提防野兵营或野外偷隐刀。
有没有其他种族组合的战术?
Z**R
发帖数: 1233
21
October 23, 2008
The first orbit-raising manoeuvre of Chandrayaan-1 spacecraft was performed
at 09:00 hrs Indian Standard Time (IST) this morning (October 23, 2008) when
the spacecraft’s 440 Newton Liquid Engine was fired for about 18 minutes
by commanding the spacecraft from Spacecraft Control Centre (SCC) at ISRO
Telemetry, Tracking and Command Network (ISTRAC) at Peenya, Bangalore. With
this engine firing, Chandrayaan-1’s apogee has been raised to 37,900 km,
while its perigee has been raised
K****o
发帖数: 2183
22
来自主题: _Auto_Fans版 - 感叹一下dual orbital polisher的好用
长周末终于有时间给车来一次detailing。不得不再次感叹machine的强大,dual
orbital polisher+light cutting pad+polish compund,用过之后paint上的水渍啥的
都消失的无影无踪,黑色的paint跟镜子一样,我现在都懒得再用什么paint cleanser
,每年detailing一次,clay之后直接polish,完了直接上wax。这个过程最费时间的就
是clay了。
w*******y
发帖数: 60932
23
searched and didn't see this anywhere. sorry if its a repost. found it on My
Memphis Mommy's blog.
type in the lot number found on the side of your gum package.
Choose your design and size.
type in your name and address and submit.
allow 10-12 weeks delivery.
Link:
http://api.lbox.com/bep/Orbit/Redeem
w*******y
发帖数: 60932
24
Altec Lansing iM-237 Orbit Ultraportable Speaker for MP3 Players (Silver):
http://www.amazon.com/Altec-Lansing-Ultraportable-Speaker-Players/dp/B001ELK2NY/ref=sr_1_3?s=electronics&ie=UTF8&qid=1293084601&sr=1-3
Technical Details
* Compatibility: all MP3 players; iPod mini; iPod nano 1G, 2G, 3G, 4G;
iPod classic 1G, 2G, 3G, 4G, 5G, 5.5G, 6G; iPod touch 1G, 2G
* Conveniently connects to any music player with 3.5-mm connection and
music phones with 2.5-mm adapter (not included)
* Single ... 阅读全帖
w*******y
发帖数: 60932
25
I purchased this at Lowe's - it's almost as cheap as the Harbor Freight one,
but much nicer. Even better if you have the 10% off coupon, which of
course my husband didn't take with him...
Black & Decker 5 inch Random orbit sander
Model RO410S
SKU 8 85911 19590 4
Similar one on Amazon is $54.99 right now....
G*******s
发帖数: 10605
26
【 以下文字转载自 SmartShopper 俱乐部 】
发信人: GoRockets (火箭加油), 信区: SmartShopper
标 题: Orbits 15% off Hotel bookings, book by Nov 17
发信站: BBS 未名空间站 (Thu Nov 14 11:34:47 2013, 美东)
Orbitz is offering 15% off qualifying hotels. Book by November 17, 2013 for
Travel by March 31, 2014. - Use coupon code: BYEBYE15 for 15% off. Or try
BYEBYE20 for 20% off for some bookings.
http://userquote.com/forum/index.php?topic=2116.msg2470#msg2470
G*******s
发帖数: 10605
27
【 以下文字转载自 SmartShopper 俱乐部 】
发信人: GoRockets (火箭加油), 信区: SmartShopper
标 题: Orbits 15% off hotel bookings, 20% off Las Vegas hotels
发信站: BBS 未名空间站 (Mon Dec 16 00:12:08 2013, 美东)
View the exclusive Orbitz available savings with this link. This will be
updated with upcoming coupons.
Save 15% on hotel stays CELEBRATE. Valid through Jan 8, 2014
Save 20% on Las Vegas hotels 48HRVEGAS. Valid Dec 16 - 18
http://userquote.com/forum/index.php?topic=2117.msg2472#msg2472
w*********g
发帖数: 30882
28
古有赵王为秦王击缶,以相娱乐,今有.....
====================================================
击卫星为大统领贺,以相娱乐.......
http://freebeacon.com/china-to-shoot-at-high-frontier/
简要翻译:美帝说TG近期将试射代号为Dong Ning-2(“东宁”?是“动能”吧?)的
反卫星武器,击碎位于高轨道(12,000 miles到22,236 miles高,GPS卫星在这个高度
)的卫星靶标,但是因为担心影响到观海同志的总统连任,这个计划被延期到美帝总统
选举之后........
China to Shoot at High Frontier
U.S. Intelligence: China to conduct test of more powerful anti-satellite
weapon capable of hitting GPS, spy satellites, but after U.S. election
BY: Bill Gertz
October ... 阅读全帖
w***n
发帖数: 2474
29
来自主题: Military2版 - 动能二号反卫导弹即将试验
http://freebeacon.com/china-to-shoot-at-high-frontier/
China to Shoot at High Frontier
U.S. Intelligence: China to conduct test of more powerful anti-satellite
weapon capable of hitting GPS, spy satellites, but after U.S. election
BY: Bill Gertz
October 16, 2012 5:00 am
China’s military is set to conduct a test of a new and more capable anti-
satellite missile that United States intelligence agencies say can knock out
strategic satellites in high-earth orbit, according to U.S. officials.
However... 阅读全帖
l****z
发帖数: 29846
30
The first private spacecraft aiming to dock with the international space
station blasted off from Florida and reached orbit early Tuesday with split-
second precision, but the biggest tests for the mission are still days ahead.
The predawn skies around Cape Canaveral filled with the bright glow and deep
rumble of Space Exploration Technologies Corp.'s Falcon 9 rocket lifting
off the pad, carrying an unmanned Dragon spacecraft on a highly anticipated
test flight scheduled to last about two weeks.... 阅读全帖
s*********i
发帖数: 45
31
来自主题: Chemistry版 - 真心求助几道本科无机试题
本人学有机的,对学生的无机问题一窍不通,哪位大虾帮帮忙,万分感谢!
Problem Set
1. We can study trends in effective nuclear charge using X-ray photoemission
spectroscopy (XPS),which measures the energy required to ionize an atom.
The X-radiation is energetic enough to excite electrons at all levels (even
core levels) so this technique can probe electrons in specific orbitals.In
an XPS experiment, C atoms reacted with a surface, forming C–Si bonds.
Before the reaction, the ionization energy was 36.7 eV; after the reaction,
it shi... 阅读全帖

发帖数: 1
32
马斯克透露,将很快开始测试星际载人飞船系统, 推力是土星五的两倍!
Musk: Atmospheric tests of interplanetary spaceship could happen next year
March 13, 2018 Stephen Clark
Artist’s concept of the BFR spaceship deploying a satellite in orbit.
Credit: SpaceX
A team of SpaceX engineers is building a prototype of the spaceship Elon
Musk hopes will one day carry people and cargo deep into the solar system,
and it could begin low-altitude testing next year, kicking off a multi-step
test campaign before eventually going into space, the... 阅读全帖
G*******n
发帖数: 6889
33
来自主题: Military版 - 中国2020年登陆火星
http://gbtimes.com/china/china-racing-make-2020-launch-window-m
Andrew Jones
2016/02/22
Mars Exploration Rover Spirit captures a stunning view as the sun sank below
the rim of the Gusev crater on Mars on May 19, 2005.Mars Exploration Rover
Spirit captures a stunning view as the sun sank below the rim of the Gusev
crater on Mars on May 19, 2005. (Photo: NASA/JPL/Texas A&M/Cornell)
Tags:
China's space programMarsNational Space Science CenterChina Aerospace
Science and Technology CorporationEur... 阅读全帖
v**e
发帖数: 8422
34
美国库存苏联发动机NK33即将用完,正招标买新的
Orbital Narrows Choices for Antares Engine Provider
Posted by Doug Messier on April 22, 2014, at 5:28 pm in News
Tags: aerojet rocketdyne, aj26, antares, nk engines, nk-33, orbital sciences
corporation.
Comments: 6 responses
6 Comments
Antares lifts off from Wallops Island. (Credit: NASA)
Antares lifts off from Wallops Island. (Credit: NASA)
Space News has an update on Orbital Sciences’ search for a new engine for
its Antares launch vehicle:
The company also said it is e... 阅读全帖
t***h
发帖数: 5601
35
来自主题: Military版 - 今晨NASA气象观察卫星发射失败
http://www.spacenews.com/launch/110301-nasas-glory-satellite-lo
Rocket Fairing Glitch Dooms NASA's Glory Mission
WASHINGTON -- NASA's $424 million Glory climate observation satellite was
lost in a March 4 launch attempt from Vandenberg Air Force Base, Calif.,
after the shroud designed to protect the spacecraft during its climb to
orbit atop a Taurus XL rocket failed to separate, agency officials said.
The Taurus XL, built by Orbital Sciences Corp. of Dulles, Va., was making
its return to flight ... 阅读全帖
Z**R
发帖数: 1233
36
【 以下文字转载自 Aviation 讨论区 】
发信人: ZZGR (闲逛), 信区: Aviation
标 题: SpaceX Dragon capsule set for launch
发信站: BBS 未名空间站 (Wed Dec 8 09:37:45 2010, 美东)
http://www.bbc.co.uk/news/science-environment-11936711
A US capsule that could soon be hauling cargo and even astronauts to the
space station is set to make its first demonstration flight on Wednesday.
The Dragon ship will be launched from Florida on a Falcon 9 rocket, with the
aim of entering a circular orbit some 300km above the planet.
After completing... 阅读全帖
g**1
发帖数: 10330
37
India's Mars mission enters second stage; outpaces space rival China
BY SHYAMANTHA ASOKAN
NEW DELHI Sun Dec 1, 2013 1:29am EST
http://www.reuters.com/article/2013/12/01/us-india-mars-idUSBRE
(Reuters) - India's first mission to Mars left Earth's orbit early on Sunday
, clearing a critical hurdle in its journey to the red planet and overtaking
the efforts in space of rival Asian giant China.
The success of the spacecraft, scheduled to orbit Mars by next September,
would carry India into a small c... 阅读全帖
Z**R
发帖数: 1233
38
来自主题: Aviation版 - SpaceX Dragon capsule set for launch
http://www.bbc.co.uk/news/science-environment-11936711
A US capsule that could soon be hauling cargo and even astronauts to the
space station is set to make its first demonstration flight on Wednesday.
The Dragon ship will be launched from Florida on a Falcon 9 rocket, with the
aim of entering a circular orbit some 300km above the planet.
After completing a number of manoeuvres in space, the capsule will then
target a splashdown in the Pacific.
Dragon and Falcon 9 are both products of California... 阅读全帖
c**i
发帖数: 6973
39
I am a biologist by training. But it appears you are as ignorant about
rockets as I.
(1) Tiangong 1 weighs merely 8.5 metric tons (hereafter tonnes). Besides
Tiangong 1 on Sept 29, 2011 Long March 2F also launched Shenzhou 5 (in 2003)
, 6 and 7, all into low Earth orbit (LEO), which is defined as "from the
Earth’s surface up to an altitude of 2,000 km."
http://en.wikipedia.org/wiki/Low_Earth_orbit
In comparison:
Geostationary transfer orbit
http://en.wikipedia.org/wiki/Geostationary_transfer_orb... 阅读全帖
l*******d
发帖数: 3343
40
http://www.bbc.co.uk/news/world-latin-america-22635671
Ecuador Pegasus satellite fears over space debris crash
The Ecuadorean space agency (EXA) is trying to pick up signals from its
satellite after it crashed in space into debris from an old rocket.
The nano-satellite, called Pegasus, was launched from the Jiuquan spaceport
in China less than a month ago.
It is Ecuador's first and only satellite in orbit.
Experts said Pegasus had collided with debris from a Soviet rocket but was
still in orbit.... 阅读全帖

发帖数: 1
41
来自主题: Military版 - SpaceX一箭10星
刚刚!SpaceX一箭10星,成功用一枚二手猎鹰火箭将10颗通讯卫星送入轨道!两天后(
周一)将再次发射,龙飞船!
Liftoff! Used SpaceX Rocket Launches 10 Iridium Satellites into Orbit
By Tariq Malik, Space.com Managing Editor | March 30, 2018 11:15am ET
A used SpaceX Falcon 9 rocket launched 10 new communications satellites into
orbit from California's Vandenberg Air Force Base today (March 30) in a
morning liftoff that also marked an anniversary for reusable rockets.
The Falcon 9 rocket, which first flew in October 2017, launched the fifth
set of Ir... 阅读全帖
s******k
发帖数: 1149
42
来自主题: SanFrancisco版 - HOT今晚德国废弃卫星碎片撞地球
坠落地点无法预测!
An old German satellite plunged to Earth Saturday evening after languishing
in a dead orbit for more than a decade, but officials do not yet know where
it fell.
The 2.7-ton Roentgen Satellite, or ROSAT, slammed into Earth's atmosphere
sometime between 9:45 p.m. EDT (0145 GMT Sunday) and 10:15 p.m. EDT (0215
GMT Sunday), according to officials at the German Aerospace Center.
"There is currently no confirmation if pieces of debris have reached Earth's
surface," German aerospace officials... 阅读全帖
f**d
发帖数: 768
43
来自主题: Neuroscience版 - eBook: From computer to brain
这是一本计算神经科学的优秀著作,全文拷贝这里(图和公式缺),有兴趣的同学可以
阅读
如需要,我可以分享PDF文件(--仅供个人学习,无商业用途)
From Computer to Brain
William W. Lytton
From Computer to Brain
Foundations of Computational Neuroscience
Springer
William W. Lytton, M.D.
Associate Professor, State University of New York, Downstato, Brooklyn, NY
Visiting Associate Professor, University of Wisconsin, Madison
Visiting Associate Professor, Polytechnic University, Brooklyn, NY
Staff Neurologist., Kings County Hospital, Brooklyn, NY
In From Computer to Brain: ... 阅读全帖
k**i
发帖数: 10191
44
长度是古埃及人使用的Pyramid Inches,时间单位就是通常意义上地球公转年。说到细
节,胡夫金字塔模拟的地球年是365.24,精确到小数点后两位(话说21世纪的今天大部
分人估计还不知道精确的一年小数位是24吧?楼上几位知道么?),古埃及的人应该没
有这么高的天文观测水平吧?还有象什么胡夫金字塔GPS坐标刚好是光速,等等,
具体你自己去这里看吧:https://grahamhancock.com/schmitze1/
胡夫金字塔和天文方面的联系,光目前已经被发现有联系的就不下20个,象和太阳重量
,月亮重,地球重量之间的精确比例,所以最有可能是具有丰富的天文知识的前文明建
造,或者某个掉到古埃及时代的外星人督造的。
– A precise definition of the Royal Cubit as it relates to the Earth
– The size and shape of the Earth
– The Mass and Density of the Earth
– The Gravitational Constant
– The Escape Vel... 阅读全帖
c**i
发帖数: 6973
45
Press release: Orbital Launches 25th Coyote Supersonic Sea-Skimming Target
Missile For U.S. Navy. Orbital, July 27, 2011
http://www.orbital.com/newsinfo/release.asp?prid=783
My comment:
(a) Fact sheet: GQM-163A Coyote; Supersonic Sea Skimming Target (SSST).
Orbital, undated.
http://www.orbital.com/newsinfo/publications/coyote_fact.pdf
The graphic shows the coyote paths with (yellow) and without (white) the
booster.
(b) US Navy has been testing warships' missile defense using as supersonic
target... 阅读全帖
R*K
发帖数: 310
46
MAVEN upon reaching the designated Mars orbit will have only one chance to
enter the the orbit, and if it does not do so, that will be the end. But we
have an additional opportunity. In case we reach on September 24, 2014 and
we are not able to perform the orbit insertion maneuver, we will have
another opportunity after three days of orbiting Mars,” said MoM project
director, M Annadurai.
According to Isro, when a spacecraft reaches the nearest point of Mars (peri
-apsis), it is maneuvered into... 阅读全帖
T**********e
发帖数: 29576
47
SpaceX Grasshopper breaks reusable rocket altitude record at 700 meters
By Graham Templeton on October 14, 2013
While NASA struggles to keep projects afloat amid a widespread government
shutdown, SpaceX continues to push the boundaries of aerospace engineering.
Last week, the company more than doubled the previous height record of its
remarkable Grasshopper rocket system. The reusable, vertical-takeoff,
vertical-landing (VTVL) rocket hit a peak altitude of 744 meters before
slowly settling back ... 阅读全帖

发帖数: 1
48
美国将于2月6日发射目前世界上最强大的火箭Space X, Falcon Heavy,可送人类至火
星!
If you have space-obsessed friends, you might have heard the name "Falcon
Heavy" used a lot lately.
Falcon Heavy is a brand new rocket that's set to launch for the first time
ever on February 6, SpaceX announced on Saturday.
The buzz can be attributed to the Falcon Heavy's size: It will be the most
powerful rocket in the world. It's built by SpaceX -- the industry-
disrupting rocket maker started by billionaire Elon Musk.
If you're just catchi... 阅读全帖

发帖数: 1
49
来自主题: Military版 - 鹅毛发射大型天文卫星
卫星搭载俄国和德国的X射线望远镜,用来探测大质量黑洞和星系团的高能辐射。
MOSCOW (AP) — A Russian Proton-M rocket successfully delivered a cutting-
edge space telescope into orbit Saturday after days of launch delays, Russia
’s space agency said.
Roscosmos said the telescope, named Spektr-RG, was delivered into a parking
orbit before a final burn Saturday that kicked the spacecraft out of Earth’
s orbit and on to its final destination: the L2 Lagrange point.
Lagrange points are unique positions in the solar system where objects can... 阅读全帖
S***n
发帖数: 330
50
来自主题: Astronomy版 - Extreme Space Discoveries of 2012
http://news.yahoo.com/most-extreme-space-discoveries-2012-12084
Astronomical discoveries in 2012 have reshaped what we know about the
universe and pushed some instruments to the very limits of their observing
power.
Scientists discovered a galaxy that harbors an enormous central black hole
17 billion times more massive than the sun. Another research group spotted a
scorching-hot rocky planet in the closest star system to our own. Meanwhile
,the records for most massive galaxy cluster and most di... 阅读全帖
1 2 3 4 5 6 7 8 9 10 下页 末页 (共10页)