Search found 3942 matches
- Tue May 31, 2016 5:39 am
- Forum: Open Space: Discuss Anything
- Topic: Timing of Mars Space Probe Launches
- Replies: 21
- Views: 3651
Re: Timing of Mars Space Probe Launches
When the Mars Global Surveyor reached it's destination it was traveling approximately 5KPS faster than Mars' relative velocity. To achieve orbit insertion and be successfully captured by Mars' Gravity Well the orbiter needed to shed about 1KPS of speed which required sufficient fuel for a 20 to 25 ...
- Mon May 30, 2016 5:43 pm
- Forum: Open Space: Discuss Anything
- Topic: Timing of Mars Space Probe Launches
- Replies: 21
- Views: 3651
Re: Timing of Mars Space Probe Launches
Got it. Mars is traveling through space at a little over 24KPS. So when the MGS arrived at a speed of 5KPS, while it was traveling significantly slower than Mars' solar orbit, it was traveling faster than Mars escape velocity and as such needed to reduce speed to 4KPS to ensure orbital insertion. So...
- Sun May 29, 2016 3:40 am
- Forum: Open Space: Discuss Anything
- Topic: Timing of Mars Space Probe Launches
- Replies: 21
- Views: 3651
Re: Timing of Mars Space Probe Launches
When the Mars Global Surveyor reached it's destination it was traveling approximately 5KPS faster than Mars' relative velocity. To achieve orbit insertion and be successfully captured by Mars' Gravity Well the orbiter needed to shed about 1KPS of speed which required sufficient fuel for a 20 to 25 m...
- Thu May 26, 2016 5:13 pm
- Forum: Open Space: Discuss Anything
- Topic: Pets
- Replies: 457
- Views: 734298
Re: Pets
Kind of like Cal Worthington and his dog spot
Click to play embedded YouTube video.
- Tue May 24, 2016 5:36 am
- Forum: The Communications Center: Breaking Science News
- Topic: HEAPOW: Bert, Ernie and Big Bird (2016 May 23)
- Replies: 1
- Views: 376
Re: HEAPOW: Bert, Ernie and Big Bird (2016 May 23)
Looks more like Mr. DNA from Jurassic Park
- Mon May 23, 2016 5:18 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Inside a Daya Bay Antineutrino Detector (2016 May 23)
- Replies: 24
- Views: 18437
Re: APOD: Inside a Daya Bay Antineutrino Detector (2016 May 23)
There was a similar device (Same??) used in the movie 2012 as an indicator that the Sun was about to catastrophically alter the EARTHygmarchi wrote:It was copied from a sci-fi movie, I just can't recall which.
- Thu May 19, 2016 5:07 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Where New Horizons is
- Replies: 606
- Views: 520042
Re: Post-Pluto Object
There is also an apparent object displaying motion in the opposite direction at the 3:00 position. It covers about 1/5th the distance in the opposite direction and is only just visible at the edge of the field of view in the second image
- Thu May 19, 2016 5:02 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Surface of Europa (2016 May 19)
- Replies: 24
- Views: 5560
Re: APOD: The Surface of Europa (2016 May 19)
definitely a place that I would like to see a Curiosity style rover examining
- Thu May 12, 2016 11:56 pm
- Forum: The Communications Center: Breaking Science News
- Topic: Dwarf Planet (225088) 2007 OR10
- Replies: 4
- Views: 1206
Re: Dwarf Planet (225088) 2007 OR10
Wonder if Snow White has seven little moons in orbit
- Thu May 12, 2016 5:55 am
- Forum: The Communications Center: Breaking Science News
- Topic: Subaru/IPMU: Deepest Galaxy Map Finds Einstein's Theory Stands True
- Replies: 5
- Views: 1508
Re: Subaru/IPMU: Deepest Galaxy Map Finds Einstein's Theory Stands True
Interesting but kind of puzzling. According to the Planck spacecraft, the latest estimated age of the universe is 13.82B years. Assuming that light speed is constant in the confines of space and hasn't changed over time, shouldn't we only be able to see back as far as first light? The graphic suppli...
- Fri May 06, 2016 5:04 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: NGC 7023: The Iris Nebula (2016 May 06)
- Replies: 8
- Views: 3099
Re: APOD: NGC 7023: The Iris Nebula (2016 May 06)
An iris has a dark dot, the pupil, in it. And :no:, it doesn't look like the flower either. https://s-media-cache-ak0.pinimg.com/236x/fd/f1/75/fdf175cbca4c0034e6616c194fe6d2ae.jpg I don't know. Doesn't the shape and color of the Iris Nebula somewhat resemble a blue iris? Ann If you rotate the Iris ...
- Thu May 05, 2016 9:15 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The SONG and the Hunter (2016 May 05)
- Replies: 16
- Views: 3420
Re: APOD: The SONG and the Hunter (2016 May 05)
Funny,
At first glance my mind thought of it as "The Song of the Hummingbird"
At first glance my mind thought of it as "The Song of the Hummingbird"
- Thu May 05, 2016 9:12 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Crossing Mars (2016 May 02)
- Replies: 59
- Views: 6043
Re: APOD: Crossing Mars (2016 May 02)
Especially if it were a One Way Trip
- Thu May 05, 2016 7:25 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The SONG and the Hunter (2016 May 05)
- Replies: 16
- Views: 3420
Re: APOD: The SONG and the Hunter (2016 May 05)
Personally, I find the concept of gravity to be very attractive but I am also repulsed by the thought of Anti Gravity
- Thu May 05, 2016 5:22 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Crossing Mars (2016 May 02)
- Replies: 59
- Views: 6043
Re: APOD: Crossing Mars (2016 May 02)
If they truly want to see if we can survive there (not likely without pressurized habitats) They should send a Payload with the next explorer project that includes a water supply and seeds to show we Can or Can't grow food there. The lander would need a small dome with internal mechanisms and camera...
- Thu May 05, 2016 5:10 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The SONG and the Hunter (2016 May 05)
- Replies: 16
- Views: 3420
Re: APOD: The SONG and the Hunter (2016 May 05)
Here is a nice evening view of the observatory with the Slit in a static position and from a slightly different perspective
- Wed May 04, 2016 5:04 pm
- Forum: Open Space: Discuss Anything
- Topic: Stream of Stuff
- Replies: 780
- Views: 385910
- Wed May 04, 2016 4:58 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Mercury Transit Sequence (2016 May 04)
- Replies: 14
- Views: 2976
Re: APOD: A Mercury Transit Sequence (2016 May 04)
Considering that Mercury covered such a small portion of the Sun's surface (smaller than many larger Sun Spots) it would more likely go undetected by any instrument incapable of discerning a small Exo-planet from a Star-spot. The only telltale sign would be from the Duration and repetition of the ev...
- Mon May 02, 2016 7:34 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Crossing Mars (2016 May 02)
- Replies: 59
- Views: 6043
Re: APOD: Crossing Mars (2016 May 02)
funny thing is, in the linked article the Dress is clearly either Light blue/Gold or White/Gold with Blueness caused by shadowing while the adjoining article definitely is Royal Blue and Black The WIKI article definitely displays a dress that is not Blue and Black https://www.buzzfeed.com/claudiakoe...
- Sat Apr 30, 2016 2:59 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Fermi's Gamma-ray Moon (2016 Apr 29)
- Replies: 25
- Views: 4498
Re: APOD: Fermi's Gamma-ray Moon (2016 Apr 29)
While the gamma ray sun may be quiet when compared to the energetic gamma ray moon, it can be far brighter than the gamma ray moon when flaring http://www.nasa.gov/images/content/658561main_LAT_all-sky_flare_March_7_2012_labels.jpg http://heasarc.gsfc.nasa.gov/docs/objects/heapow/archive/solar_syste...
- Fri Apr 29, 2016 5:03 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Fermi's Gamma-ray Moon (2016 Apr 29)
- Replies: 25
- Views: 4498
Re: APOD: Fermi's Gamma-ray Moon (2016 Apr 29)
This would have been a much better image if it were taken near Solar Eclipse and had both the Sun and Moon in the same image.
But not bad though...
Why, the Moon is just teeming with Energy. All we need to do is find a way to gather that Gamma and put it to use.
But not bad though...
Why, the Moon is just teeming with Energy. All we need to do is find a way to gather that Gamma and put it to use.
- Fri Apr 29, 2016 4:59 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Fermi's Gamma-ray Moon (2016 Apr 29)
- Replies: 25
- Views: 4498
Re: APOD: Fermi's Gamma-ray Moon (2016 Apr 29)
APOD wrote [cut] up to a billion or more times [cut] which sounds "as heard on TV". Don't mess with gamma rays. They're seriously energetic. There's a reason people don't go near the Chernobyl site and why astronauts need shielding from them! (Although apparently humans are more harmful t...
- Fri Apr 29, 2016 6:02 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Dust Angel Nebula (2016 Apr 28)
- Replies: 18
- Views: 3557
Re: APOD: A Dust Angel Nebula (2016 Apr 28)
Ann,
That is a really interesting elliptical galaxy with the interior dust lanes and apparent blue starbirth within it. There is also an interesting apparent toroidal structure visible
That is a really interesting elliptical galaxy with the interior dust lanes and apparent blue starbirth within it. There is also an interesting apparent toroidal structure visible
- Fri Apr 29, 2016 5:47 am
- Forum: Open Space: Discuss Anything
- Topic: Stream of Stuff
- Replies: 780
- Views: 385910
Re: Stream of Stuff
At least the police didn't kill this crazy person even though it could have been devastating if the device were real. I'm kinda surprised that they didn't shoot to kill
- Fri Apr 22, 2016 5:43 pm
- Forum: Open Space: Discuss Anything
- Topic: Happy Earth Day April 22
- Replies: 0
- Views: 1099
Happy Earth Day April 22
Happy Earth Day to all