C_dave Science

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All you need to know about James Webb Space Telescope ⬇️⬇️

WHAT IS THE JAMES WEBB SPACE TELESCOPE?

The James Webb Space Telescope, also called Webb or JWST, is a large, space-based observatory, optimized for infrared wavelengths, which will complement and extend the discoveries of the Hubble Space Telescope.

It will cover longer wavelengths of light than Hubble and will have greatly improved sensitivity. The longer wavelengths enable JWST to look further back in time to see the first galaxies that formed in the early universe, and to peer inside dust clouds where stars and planetary systems are forming today.

WHAT ARE THE MOST EXCITING THINGS WE WILL LEARN?

We have yet to observe the era of our universe’s history when galaxies began to form. We have a lot to learn about how galaxies got supermassive black holes in their centers, and we don't really know whether the black holes caused the galaxies to form or vice versa. We can't see inside dust clouds with high resolution, where stars and planets are being born nearby, but Webb will be able to do just that. We don't know how many planetary systems might be hospitable to life, but Webb could tell whether some Earth-like planets have enough water to have oceans. We don't know much about dark matter or dark energy, but we are expecting to learn more about where the dark matter is now, and we hope to learn the history of the acceleration of the universe that we attribute to dark energy. And then, there are the surprises we can't imagine!

WHY IS WEBB AN INFRARED TELESCOPE?

By viewing the universe at infrared wavelengths Webb will show us things never before seen by any other telescope. It is only at infrared wavelengths that we can see the first stars and galaxies forming after the Big Bang. And it is with infrared light that we can see stars and planetary systems forming inside clouds of dust that are opaque to visible light.

The primary goals of Webb are to study galaxy, star and planet formation.

12Volts battery charger with auto cut off.

The circuit uses a comparator IC (LM358), and a 547 BJT to achieve the auto cut off. When the battery gets fully charged to about 12.7v, the Non Inverting input of the comparator senses this voltage via R5 and the voltage if measure again or compared with the voltage from VR1. When the non inverting input gets higher than the Inverting input, the comparator goes high and turns on the BJT via R1, this allows the Relay switch to turn on and hence cutting the voltage supply to the battery.
LED (Red for Charging), LED (Green for Full charge).

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