From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr1-x435.google.com (mail-wr1-x435.google.com [IPv6:2a00:1450:4864:20::435]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id DEFFC3B2A4 for ; Thu, 3 Nov 2022 13:52:53 -0400 (EDT) Received: by mail-wr1-x435.google.com with SMTP id k8so3950172wrh.1 for ; Thu, 03 Nov 2022 10:52:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=ZlV41Lv3pi4TkcBXRMkuq5U9uq3YtEJsTsFXSRGa6Aw=; b=HGprS1HKuQdTCT6Iv187f7K8hCVehAftcydVy0ECKOQdugCfs2FFA9Zrzax3mzvd71 zjdDIEV4Y6EPFnXlpVj7bkyFJdy/z5I/a+ZDdAqTMDpEqT6VnGBecdsgchkMGW8UQSSF Pso+UsG2HZCF6xxgHpVTuXRDtf4e6//Znhadc7nCm03EI6uDqQLYid8Y38vZHWjIr8L4 glN7PUvXtd7aBNNcA0rJebSVxZ9Uo/JpbEkpCodOgBnVmaax4ExL3tNNQVFK96GRdTC5 VFlti7tkvQzqjPJ+lOxQ2qdeI2CgBbJh/RVk2HziGUsm0xq6d4znJ/T9celP5m58b1qM b/yQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=ZlV41Lv3pi4TkcBXRMkuq5U9uq3YtEJsTsFXSRGa6Aw=; b=COJUhXIDkvygJxTM8FCY+dWR0l0eQfXnm+G/gtFMp+wmNRLOptVcx0sJxquo7Z+sWX QTngEMKHcv9WDm5j/EuWD67tOVC9tSoSEDmK8tevh2/ucQl5KyhZn18yWnXwH3CeZWrL h07YPzXm4mjNzLtSyV+QS4L2EwiQ3cx4+4j8GkYdBsVOsJ/jyL8pmj/TP8D9e3BERKRG qNN6UnbdMr/HSDJZjQ+KxjgPBIbTZPyc2L67LYt/FVuQy2babkc1iVmYnlvc7O60Rd/t ey7Vw3cfKonSejYglvvaaOxyUN9UuhgidnvzXDgYlQwoieopkGZZtugkgKdYrYjUe6xX hP7Q== X-Gm-Message-State: ACrzQf0/9LujKuyI0zrGIQCD892SDnLIleVSoig/b0eS4yaVsXTJCZ5W Oez4OI6soRZYXEeLNUHc8u/pL/rMfvvcaE2kA1ZgUJq8qmU= X-Google-Smtp-Source: AMsMyM77tm62NtSXyrZpbWfEWWLZvbcssvtexc0fmkLGqJBt9cLN2UrbfClGPQYCrAD8TOz0XRQNMHiBuYJF+9vEYmI= X-Received: by 2002:a5d:47a1:0:b0:236:6f4d:1db3 with SMTP id 1-20020a5d47a1000000b002366f4d1db3mr19356328wrb.383.1667497972774; Thu, 03 Nov 2022 10:52:52 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dave Taht Date: Thu, 3 Nov 2022 10:52:40 -0700 Message-ID: To: Bruce Perens Cc: Dave Taht via Starlink Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Starlink] Hitting an atira asteroid with a spacex starship? X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 03 Nov 2022 17:52:54 -0000 On Thu, Nov 3, 2022 at 10:37 AM Bruce Perens wrote: > > If you own a 50 ton spaceship, please do not intentionally hit any astero= ids or other objects with it. Song of the day: https://www.youtube.com/watch?v=3D8RbXIMZmVv8 >What you get is smaller objects heading in different directions at differe= nt velocities, none of which are all that predictable, and in total more da= nger to objects in space than before and still significant danger to ground= objects. Space is a big place, and I'm pretty sure the orbit, impact, and debris could be tracked. What would you do with a starship that after launch, due to lost tiles, or other problems is certain to burn up on re-entry? Why not test getting out of orbit? >What you want is to turn it harmless. This is done by gently attaching to = it and then giving it a controlled push. That takes all the fun out of it. Impact is so much easier. Our knowledge of the solar system is only skin deep. > > I've been curious about what one could do over time just using the pressu= re of light from the ground, or enough light to gassify material to add del= ta V, however high power devices for this would also be effective weapons. And kinetic weapons aren't? > Thanks > > Bruce > > On Thu, Nov 3, 2022 at 5:28 PM Dave Taht via Starlink wrote: >> >> So, what would happen if we hit one of these (3 new ones discovered >> yesterday) with 50tons of starship, at 15 klicks per second? [1] >> >> https://en.wikipedia.org/wiki/Atira_asteroid >> >> the three new ones, discovered and announced a day or three back: >> >> https://www.smithsonianmag.com/smart-news/three-near-earth-asteroids-wer= e-hiding-in-the-suns-glare-180981055/ >> >> (Atira class are rocks within earth orbit. They are very hard to see, >> probably overly baked (low on volatiles), and get bright sun all the >> time) >> >> [1] I'm very inspired by DART, but afraid to do the math for this >> tonnage and speed. (anyone? there's a LOT of zeroes... ) I have >> project ploughshare on my mind, except kinetic, and it's less >> deflection on my mind than reducing a rubble pile to rubble, >> identifying the good pieces, and bringing them back. >> >> >> >> -- >> This song goes out to all the folk that thought Stadia would work: >> https://www.linkedin.com/posts/dtaht_the-mushroom-song-activity-69813666= 65607352320-FXtz >> Dave T=C3=A4ht CEO, TekLibre, LLC >> _______________________________________________ >> Starlink mailing list >> Starlink@lists.bufferbloat.net >> https://lists.bufferbloat.net/listinfo/starlink > > > > -- > Bruce Perens K6BP --=20 This song goes out to all the folk that thought Stadia would work: https://www.linkedin.com/posts/dtaht_the-mushroom-song-activity-69813666656= 07352320-FXtz Dave T=C3=A4ht CEO, TekLibre, LLC