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India Launches 104 Satellites From a Single Rocket, Ramping Up a Space Race – The New York Times

June 8th, 2019 No comments

Source: India Launches 104 Satellites From a Single Rocket, Ramping Up a Space Race – The New York Times

??Part of Plant Link’s PlantScope monitoring constellation (120 satellites)??

Also, love the mention of a cricket term (“century”, for 100 satellites, although what happens to the other 4 are let to the imagination?).

Update: “century” is 100 or more runs in a single inning.  So I’ll permit it.

 

Categories: India, Space Tags:

IAU Statement on Satellite Constellations | IAU

June 6th, 2019 1 comment
Categories: Astronomy, Elon Musk, Space, Uh-oh Tags:

Trails made by Starlink satellites | IAU

June 6th, 2019 No comments

Source: Trails made by Starlink satellites | IAU

60 up, 1140 to go.

One point: the link suggests these satellites will fade; a week after launch they were mag. 3 to 6, and seemed to me to be heading dimmer (magnitudes work in reverse, like wire gauge, well, AWG at least… ).  So they could be out of naked eye view (>~mag 6) if they go much higher.

But if they’re doing 12000 total over 10 years, 200 launches, 20 a year.  So ~2 times a month there will be a multi-week interuuption in dark sky astronomy.

Another point: these sateliites, as with all that aren’t generating their own light (which is all current satellites), are visible by the reflected light from the just-set sun.  Once the sun sets far enough, sunlight doesn’t reach these satellites.  Think of being on the satellite, 300km high orbit, the sun sets when *you* can’t see it anymore.  And for satellites in such a low orbit, this is not very long, perhaps 1 hour after sunset.

Categories: Astronomy, Elon Musk, Space, Uh-oh Tags:

The astronomical magnitude scale

May 29th, 2019 No comments

Primary and secondary information on comets and observing comets.

Source: The astronomical magnitude scale

Categories: Astronomy, Info, Space Tags:

6 Asteroids Will Buzz Earth Within a 2-Year Span and Scientists are Psyched | Space

May 27th, 2019 No comments
Categories: Space, Uh-oh Tags:

Our lopsided Moon was likely hit by a dwarf planet | Astronomy.com

May 25th, 2019 No comments

After the Moon was forged in a cataclysmic collision between Earth and a Mar-sized planet, it apparently took a second blow from a dwarf planet.

Source: Our lopsided Moon was likely hit by a dwarf planet | Astronomy.com

Categories: Space Tags:

Mars 2020 Boarding Pass

May 24th, 2019 No comments

Go here: https://mars.nasa.gov/participate/send-your-name/mars2020/

Mine.

<iframe width="980" height="410" src="https://mars.nasa.gov/layout/embed/send-your-name/mars2020/certificate/?cn=41603407058" frameborder="0"></iframe>
Categories: Space Tags:

Watch International Space Station Flybys All Night Long – Sky & Telescope

May 23rd, 2019 No comments
Categories: Space Tags:

Starlink: How SpaceX’s 12,000-satellite internet network will work – Business Insider

May 23rd, 2019 No comments
Categories: Elon Musk, Space Tags:

NASA asteroid WARNING: 1.8 MILE asteroid KW4 will skim Earth at 48,100 MPH | Science | News | Express.co.uk

May 23rd, 2019 No comments
Categories: Space, Uh-oh Tags: