STELLAR EVOLUTION
-Life Cycle: Nebula —> Protostar —> Main-sequence Star —> Red Giant/Red Supergiant —> Stellar Remnant.
-Sun-like stars: Red Giant —> Planetary Nebula —> White Dwarf —> eventually Black Dwarf.
-Massive stars: Red Supergiant —> Supernova —> Neutron Star/Pulsar or Black Hole.
-White Dwarf: Hot, Earth-sized, extremely dense dead stellar core; no sustained nuclear fusion; supported by electron degeneracy pressure.
-Pulsar: Rapidly rotating, highly magnetised neutron star emitting periodic radiation pulses.
🔭 IN NEWS: eRASSU J0608
Two white dwarfs orbit each other every 374 seconds (~6 min) and are rapidly spiralling inward, largely due to gravitational-wave energy loss.
Missions mentioned:
eROSITA —> X-ray telescope on Russian-German Spektr-RG | Einstein Probe —> Chinese-led X-ray mission | NICER —> NASA X-ray instrument on ISS | XMM-Newton —> ESA X-ray space observatory.
#CA2026
#SPACE
👇🏻👇🏻
-Life Cycle: Nebula —> Protostar —> Main-sequence Star —> Red Giant/Red Supergiant —> Stellar Remnant.
-Sun-like stars: Red Giant —> Planetary Nebula —> White Dwarf —> eventually Black Dwarf.
-Massive stars: Red Supergiant —> Supernova —> Neutron Star/Pulsar or Black Hole.
-White Dwarf: Hot, Earth-sized, extremely dense dead stellar core; no sustained nuclear fusion; supported by electron degeneracy pressure.
-Pulsar: Rapidly rotating, highly magnetised neutron star emitting periodic radiation pulses.
🔭 IN NEWS: eRASSU J0608
Two white dwarfs orbit each other every 374 seconds (~6 min) and are rapidly spiralling inward, largely due to gravitational-wave energy loss.
Missions mentioned:
eROSITA —> X-ray telescope on Russian-German Spektr-RG | Einstein Probe —> Chinese-led X-ray mission | NICER —> NASA X-ray instrument on ISS | XMM-Newton —> ESA X-ray space observatory.
#CA2026
#SPACE
👇🏻👇🏻
👍3❤1
India Optel Limited (IOL) has launched ‘GARUD’ High Resolution Binoculars for the civil market, bringing India’s trusted defence-grade optical expertise to outdoor enthusiasts and professionals.
Developed & manufactured indigenously by Ordnance Factory, Dehradun, GARUD features 8X magnification, 7.6° wide field of view, ±5 diopter adjustment and weather-resistant construction.
#CA2026
#DEFENCE
Developed & manufactured indigenously by Ordnance Factory, Dehradun, GARUD features 8X magnification, 7.6° wide field of view, ±5 diopter adjustment and weather-resistant construction.
#CA2026
#DEFENCE
❤5