54 votes

ELI5: Why do they say that Israel would have been the fourth country to land a spacecraft on the Moon and why do they call it low cost?

Chandrayaan-1 hit the Moon at high speed and did not survive its "landing", which would have been much more difficult to engineer. (Its successor, Chandrayaan-2, which will actually land, is expected ...
Nathan Tuggy's user avatar
  • 4,566
18 votes

Why is Beresheet doing a only a one-way trip?

A one-way trip is much simpler and much cheaper than a return mission. a return mission is more complicated because it has to do more a return mission is much heavier (because of the extra systems, ...
Hobbes's user avatar
  • 127k
9 votes
Accepted

Why don't SpaceIL's Beresheet spacecraft and Moon orbits line up?

The Moon is upside down!! First line of data_m.txt: 22 Feb 2019 00:25:25.342,360092.027359,47067.127093,-13285.073162 JPL ...
uhoh's user avatar
  • 149k
8 votes

How SpaceIL Beresheet gets to Moon from GTO?

The burns are not necessarily in plane burns, and therefore maneuvers do not only increase the apogee. In fact, a 2013 video of the work in progress on the trajectory shows quite a significant out-of-...
ChrisR's user avatar
  • 6,220
6 votes
Accepted

Could Beresheet's retroreflector array (still) be used?

The final impact velocity of Beresheet with the lunar surface has been estimated as around 1000 meters per second, comparable to the muzzle velocity of a rifle bullet. While the impact was glancing, ...
Ilmari Karonen's user avatar
5 votes
Accepted

Why were blood and hair follicles from 25 people put on the Moon?

Nova Spivack explained in a tweet: We sent enough DNA to regenerate life on Earth, if necessary. Although it would require more advanced biotech than we have to do that. At least our DNA is ...
amI's user avatar
  • 720
5 votes

Do we know why communications with Beresheet and NASA were lost during the attempted landing of the Moon lander?

A recent update blames it on what I'd call a "command error"; apparently the full ramifications of the command that was sent weren't understood. Six days after SpaceIL's Beresheet spacecraft crash-...
Organic Marble's user avatar
5 votes

Do we know why communications with Beresheet and NASA were lost during the attempted landing of the Moon lander?

Earlier in the stream they mentioned a glitch or unusual behavior with the IMU, but contact remained. Later in the burn the engine shutdown unexpectedly and they immediately reset the spacecraft to ...
Saiboogu's user avatar
  • 6,427
4 votes

Is post-X-prize Beresheet better than the X-prize candidate?

Is post-X-prize Beresheet better than the X-prize candidate? No. The post-X-prize Beresheet has the same mission as the X-prize candidate. Furthermore, "cost" is a poor proxy for "better" in terms of ...
dotancohen's user avatar
  • 6,734
4 votes

How SpaceIL Beresheet gets to Moon from GTO?

Official site offers static and dynamic view of the full path to the Moon: http://live.spaceil.com Raw data (undocumented, possibly x, y, z ,vx, vy, vz geocentric): http://live.spaceil.com/data/...
jumpjack's user avatar
  • 3,033
3 votes

Tracking SpaceIL Beresheet Moon lander

tl;dr: Get most recent TLE from Celestrak now, and keep downloading them (here are a few I got from Celestrak recently) or get all historic TLEs from Space-Track (but you have to register and follow ...
uhoh's user avatar
  • 149k
2 votes
Accepted

Two consecutive high profile Moon landings fail, any common threads?

Failures with space satellite missions to other planets is very common. ...
Bankroll's user avatar
2 votes

Tracking SpaceIL Beresheet Moon lander

Here's the plot of the data in data_s1.txt (spacecraft) and data_m.txt (Moon). There are proper state vectors for the spacecraft ...
uhoh's user avatar
  • 149k

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